256797087 has 32 divisors (see below), whose sum is σ = 380712960. Its totient is φ = 153231360.

The previous prime is 256797077. The next prime is 256797109. The reversal of 256797087 is 780797652.

It is not a de Polignac number, because 256797087 - 2⁷ = 256796959 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256797077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 91903 + ... + 94655.

It is an arithmetic number, because the mean of its divisors is an integer number (11897280).

Almost surely, 2^256797087 is an apocalyptic number.

256797087 is a deficient number, since it is larger than the sum of its proper divisors (123915873).

256797087 is a wasteful number, since it uses less digits than its factorization.

256797087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2863.

The product of its (nonzero) digits is 1481760, while the sum is 51.

The square root of 256797087 is about 16024.8896096042. The cubic root of 256797087 is about 635.6187467201.

The spelling of 256797087 in words is "two hundred fifty-six million, seven hundred ninety-seven thousand, eighty-seven".