256306672 has 10 divisors (see below), whose sum is σ = 496594208. Its totient is φ = 128153328.

The previous prime is 256306657. The next prime is 256306717. The reversal of 256306672 is 276603652.

It is a super-2 number, since 2×256306672² = 131386220223431168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8009568 + ... + 8009599.

Almost surely, 2^256306672 is an apocalyptic number.

It is an amenable number.

256306672 is a deficient number, since it is larger than the sum of its proper divisors (240287536).

256306672 is a wasteful number, since it uses less digits than its factorization.

256306672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16019175 (or 16019169 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 256306672 is about 16009.5806316093. The cubic root of 256306672 is about 635.2138672429.

The spelling of 256306672 in words is "two hundred fifty-six million, three hundred six thousand, six hundred seventy-two".