256080978 has 12 divisors (see below), whose sum is σ = 554842158. Its totient is φ = 85360320.

The previous prime is 256080967. The next prime is 256080983. The reversal of 256080978 is 879080652.

256080978 is a `hidden beast` number, since 2 + 560 + 80 + 9 + 7 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 160959969 + 95121009 = 12687^2 + 9753^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7113343 + ... + 7113378.

Almost surely, 2^256080978 is an apocalyptic number.

256080978 is an abundant number, since it is smaller than the sum of its proper divisors (298761180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256080978 is a wasteful number, since it uses less digits than its factorization.

256080978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14226729 (or 14226726 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 256080978 is about 16002.5303624146. The cubic root of 256080978 is about 635.0273640222.

It can be divided in two parts, 2560 and 80978, that added together give a palindrome (83538).

The spelling of 256080978 in words is "two hundred fifty-six million, eighty thousand, nine hundred seventy-eight".