256399927 has 32 divisors (see below), whose sum is σ = 319334400. Its totient is φ = 200981088.

The previous prime is 256399901. The next prime is 256399939. The reversal of 256399927 is 729993652.

It is not a de Polignac number, because 256399927 - 2⁷ = 256399799 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256399987) 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, 611724 + ... + 612142.

It is an arithmetic number, because the mean of its divisors is an integer number (9979200).

Almost surely, 2^256399927 is an apocalyptic number.

256399927 is a deficient number, since it is larger than the sum of its proper divisors (62934473).

256399927 is a wasteful number, since it uses less digits than its factorization.

256399927 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595.

The product of its digits is 1837080, while the sum is 52.

The square root of 256399927 is about 16012.4928415285. The cubic root of 256399927 is about 635.2908969536.

The spelling of 256399927 in words is "two hundred fifty-six million, three hundred ninety-nine thousand, nine hundred twenty-seven".