256813376 has 14 divisors (see below), whose sum is σ = 509614170. Its totient is φ = 128406656.

The previous prime is 256813369. The next prime is 256813379. The reversal of 256813376 is 673318652.

It can be written as a sum of positive squares in only one way, i.e., 144961600 + 111851776 = 12040^2 + 10576^2 .

It is a super-2 number, since 2×256813376² = 131906220185034752, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256813379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2006291 + ... + 2006418.

Almost surely, 2^256813376 is an apocalyptic number.

It is an amenable number.

256813376 is a deficient number, since it is larger than the sum of its proper divisors (252800794).

256813376 is an equidigital number, since it uses as much as digits as its factorization.

256813376 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4012721 (or 4012711 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 256813376 is about 16025.3978421754. The cubic root of 256813376 is about 635.6321858326.

The spelling of 256813376 in words is "two hundred fifty-six million, eight hundred thirteen thousand, three hundred seventy-six".