215976960 has 264 divisors, whose sum is σ = 772783440. Its totient is φ = 55738368.

The previous prime is 215976953. The next prime is 215976977. The reversal of 215976960 is 69679512.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1981386 + ... + 1981494.

It is an arithmetic number, because the mean of its divisors is an integer number (2927210).

Almost surely, 2^215976960 is an apocalyptic number.

215976960 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215976960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386391720).

215976960 is an abundant number, since it is smaller than the sum of its proper divisors (556806480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215976960 is a wasteful number, since it uses less digits than its factorization.

215976960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 215976960 is about 14696.1545990780. The cubic root of 215976960 is about 599.9786659081.

The spelling of 215976960 in words is "two hundred fifteen million, nine hundred seventy-six thousand, nine hundred sixty".