256046979 has 32 divisors (see below), whose sum is σ = 370206720. Its totient is φ = 156828672.

The previous prime is 256046977. The next prime is 256046981. The reversal of 256046979 is 979640652.

It is an interprime number because it is at equal distance from previous prime (256046977) and next prime (256046981).

It is not a de Polignac number, because 256046979 - 2¹ = 256046977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256046977) 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, 414679 + ... + 415295.

It is an arithmetic number, because the mean of its divisors is an integer number (11568960).

Almost surely, 2^256046979 is an apocalyptic number.

256046979 is a deficient number, since it is larger than the sum of its proper divisors (114159741).

256046979 is a wasteful number, since it uses less digits than its factorization.

256046979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819.

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 256046979 is about 16001.4680264031. The cubic root of 256046979 is about 634.9992593043. Note that the first 3 decimals are identical.

The spelling of 256046979 in words is "two hundred fifty-six million, forty-six thousand, nine hundred seventy-nine".