270480

Appears in sequences

• Triangular numbers with a triangular number of divisors which set a new record for number of divisors.at n=5A076172
• Triangular numbers which are 9-almost primes.at n=4A076583
• Smallest triangular number having n^2 as divisor.at n=27A080983
• Hexagonal numbers whose number of divisors is also a hexagonal number.at n=13A116565
• Triangular numbers that are the product of two triangular numbers greater than 1.at n=36A188630
• Refactorable triangular numbers.at n=33A272524
• Numbers n such that n^2+k-1 is the sum of two nonzero squares in exactly k ways for all k = 1, 2, 3.at n=19A273341
• Triangular numbers that can be represented as a sum of two distinct triangular numbers, and as a product of two triangular numbers greater than 1.at n=16A295768
• Expansion of (1/x) * Series_Reversion( x / (1 + x + x^2 * (1 + x)^3) ).at n=11A378425