256939377 has 16 divisors (see below), whose sum is σ = 374441472. Its totient is φ = 156015360.

The previous prime is 256939369. The next prime is 256939399. The reversal of 256939377 is 773939652.

256939377 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256939377 - 2³ = 256939369 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (256939307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79678 + ... + 82839.

It is an arithmetic number, because the mean of its divisors is an integer number (23402592).

Almost surely, 2^256939377 is an apocalyptic number.

It is an amenable number.

256939377 is a deficient number, since it is larger than the sum of its proper divisors (117502095).

256939377 is a wasteful number, since it uses less digits than its factorization.

256939377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162568.

The product of its digits is 2143260, while the sum is 51.

The square root of 256939377 is about 16029.3286509448. The cubic root of 256939377 is about 635.7361227817.

The spelling of 256939377 in words is "two hundred fifty-six million, nine hundred thirty-nine thousand, three hundred seventy-seven".