2157704832 has 64 divisors (see below), whose sum is σ = 5736276000. Its totient is φ = 718623744.

The previous prime is 2157704803. The next prime is 2157704833. The reversal of 2157704832 is 2384077512.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×2157704832² = 9311380284072296448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2157704833) by changing a digit.

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, 804678 + ... + 807354.

Almost surely, 2^2157704832 is an apocalyptic number.

It is an amenable number.

2157704832 is an abundant number, since it is smaller than the sum of its proper divisors (3578571168).

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

2157704832 is a wasteful number, since it uses less digits than its factorization.

2157704832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4793 (or 4781 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 2157704832 is about 46451.1015154646. The cubic root of 2157704832 is about 1292.2028008709.

The spelling of 2157704832 in words is "two billion, one hundred fifty-seven million, seven hundred four thousand, eight hundred thirty-two".