256642032 has 20 divisors (see below), whose sum is σ = 662992040. Its totient is φ = 85547328.

The previous prime is 256641997. The next prime is 256642037. The reversal of 256642032 is 230246652.

256642032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256642037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2673307 + ... + 2673402.

It is an arithmetic number, because the mean of its divisors is an integer number (33149602).

Almost surely, 2^256642032 is an apocalyptic number.

It is an amenable number.

256642032 is an abundant number, since it is smaller than the sum of its proper divisors (406350008).

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

256642032 is a wasteful number, since it uses less digits than its factorization.

256642032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5346720 (or 5346714 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 256642032 is about 16020.0509362486. The cubic root of 256642032 is about 635.4907913388.

Adding to 256642032 its reverse (230246652), we get a palindrome (486888684).

The spelling of 256642032 in words is "two hundred fifty-six million, six hundred forty-two thousand, thirty-two".