256451004 has 36 divisors (see below), whose sum is σ = 649453896. Its totient is φ = 85325088.

The previous prime is 256450991. The next prime is 256451017. The reversal of 256451004 is 400154652.

256451004 is a `hidden beast` number, since 2 + 5 + 645 + 10 + 0 + 4 = 666.

256451004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (256450991) and next prime (256451017).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13942 + ... + 26594.

It is an arithmetic number, because the mean of its divisors is an integer number (18040386).

Almost surely, 2^256451004 is an apocalyptic number.

It is an amenable number.

256451004 is an abundant number, since it is smaller than the sum of its proper divisors (393002892).

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

256451004 is a wasteful number, since it uses less digits than its factorization.

256451004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13226 (or 13221 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 256451004 is about 16014.0876730459. The cubic root of 256451004 is about 635.3330792312. Note that the first 3 decimals are identical.

The spelling of 256451004 in words is "two hundred fifty-six million, four hundred fifty-one thousand, four".