256694632 has 48 divisors (see below), whose sum is σ = 502795620. Its totient is φ = 122849280.

The previous prime is 256694609. The next prime is 256694653. The reversal of 256694632 is 236496652.

It can be written as a sum of positive squares in 2 ways, for example, as 253892356 + 2802276 = 15934^2 + 1674^2 .

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, 1329928 + ... + 1330120.

Almost surely, 2^256694632 is an apocalyptic number.

It is an amenable number.

256694632 is a deficient number, since it is larger than the sum of its proper divisors (246100988).

256694632 is a wasteful number, since it uses less digits than its factorization.

256694632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 399 counting only the distinct ones).

The product of its digits is 466560, while the sum is 43.

The square root of 256694632 is about 16021.6925447969. The cubic root of 256694632 is about 635.5342039889.

The spelling of 256694632 in words is "two hundred fifty-six million, six hundred ninety-four thousand, six hundred thirty-two".