256797910 has 16 divisors (see below), whose sum is σ = 463186512. Its totient is φ = 102508000.

The previous prime is 256797907. The next prime is 256797911. The reversal of 256797910 is 19797652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256797911) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 21241 + ... + 31060.

It is an arithmetic number, because the mean of its divisors is an integer number (28949157).

Almost surely, 2^256797910 is an apocalyptic number.

256797910 is a deficient number, since it is larger than the sum of its proper divisors (206388602).

256797910 is a wasteful number, since it uses less digits than its factorization.

256797910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52799.

The product of its (nonzero) digits is 238140, while the sum is 46.

The square root of 256797910 is about 16024.9152883876. The cubic root of 256797910 is about 635.6194257435.

The spelling of 256797910 in words is "two hundred fifty-six million, seven hundred ninety-seven thousand, nine hundred ten".