256760057 has 10 divisors (see below), whose sum is σ = 265818498. Its totient is φ = 247997088.

The previous prime is 256760047. The next prime is 256760071. The reversal of 256760057 is 750067652.

It can be written as a sum of positive squares in 5 ways, for example, as 72777961 + 183982096 = 8531^2 + 13564^2 .

It is not a de Polignac number, because 256760057 - 2⁸ = 256759801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256760057.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256760047) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1874093 + ... + 1874229.

Almost surely, 2^256760057 is an apocalyptic number.

It is an amenable number.

256760057 is a deficient number, since it is larger than the sum of its proper divisors (9058441).

256760057 is an frugal number, since it uses more digits than its factorization.

256760057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 256760057 is about 16023.7341777752. The cubic root of 256760057 is about 635.5881932925.

The spelling of 256760057 in words is "two hundred fifty-six million, seven hundred sixty thousand, fifty-seven".