256957130 has 16 divisors (see below), whose sum is σ = 467104104. Its totient is φ = 101764800.

The previous prime is 256957123. The next prime is 256957133. The reversal of 256957130 is 31759652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 237252409 + 19704721 = 15403^2 + 4439^2 .

It is not an unprimeable number, because it can be changed into a prime (256957133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126197 + ... + 128216.

Almost surely, 2^256957130 is an apocalyptic number.

256957130 is a deficient number, since it is larger than the sum of its proper divisors (210146974).

256957130 is a wasteful number, since it uses less digits than its factorization.

256957130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254521.

The product of its (nonzero) digits is 56700, while the sum is 38.

The square root of 256957130 is about 16029.8824075537. The cubic root of 256957130 is about 635.7507643203.

The spelling of 256957130 in words is "two hundred fifty-six million, nine hundred fifty-seven thousand, one hundred thirty".