215788072 has 32 divisors (see below), whose sum is σ = 443183400. Its totient is φ = 98043904.

The previous prime is 215788051. The next prime is 215788109. The reversal of 215788072 is 270887512.

It can be written as a sum of positive squares in 4 ways, for example, as 195049156 + 20738916 = 13966^2 + 4554^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23413 + ... + 31300.

Almost surely, 2^215788072 is an apocalyptic number.

It is an amenable number.

215788072 is an abundant number, since it is smaller than the sum of its proper divisors (227395328).

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

215788072 is a wasteful number, since it uses less digits than its factorization.

215788072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54765 (or 54761 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 215788072 is about 14689.7267503518. The cubic root of 215788072 is about 599.8037061586.

The spelling of 215788072 in words is "two hundred fifteen million, seven hundred eighty-eight thousand, seventy-two".