256871536 has 20 divisors (see below), whose sum is σ = 500989264. Its totient is φ = 127584000.

The previous prime is 256871491. The next prime is 256871569. The reversal of 256871536 is 635178652.

It is a junction number, because it is equal to n+sod(n) for n = 256871492 and 256871501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50745 + ... + 55576.

Almost surely, 2^256871536 is an apocalyptic number.

It is an amenable number.

256871536 is a deficient number, since it is larger than the sum of its proper divisors (244117728).

256871536 is a wasteful number, since it uses less digits than its factorization.

256871536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106480 (or 106474 counting only the distinct ones).

The product of its digits is 302400, while the sum is 43.

The square root of 256871536 is about 16027.2123589850. The cubic root of 256871536 is about 635.6801656512.

The spelling of 256871536 in words is "two hundred fifty-six million, eight hundred seventy-one thousand, five hundred thirty-six".