256812356 has 12 divisors (see below), whose sum is σ = 460383420. Its totient is φ = 125274240.

The previous prime is 256812349. The next prime is 256812419. The reversal of 256812356 is 653218652.

256812356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47141956 + 209670400 = 6866^2 + 14480^2 .

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, 782801 + ... + 783128.

It is an arithmetic number, because the mean of its divisors is an integer number (38365285).

Almost surely, 2^256812356 is an apocalyptic number.

It is an amenable number.

256812356 is a deficient number, since it is larger than the sum of its proper divisors (203571064).

256812356 is a wasteful number, since it uses less digits than its factorization.

256812356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1565974 (or 1565972 counting only the distinct ones).

The product of its digits is 86400, while the sum is 38.

The square root of 256812356 is about 16025.3660176609. The cubic root of 256812356 is about 635.6313443063.

The spelling of 256812356 in words is "two hundred fifty-six million, eight hundred twelve thousand, three hundred fifty-six".