680404256 has 24 divisors (see below), whose sum is σ = 1530910080. Its totient is φ = 291601728.

The previous prime is 680404253. The next prime is 680404261. The reversal of 680404256 is 652404086.

It is not an unprimeable number, because it can be changed into a prime (680404253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1518536 + ... + 1518983.

It is an arithmetic number, because the mean of its divisors is an integer number (63787920).

Almost surely, 2^680404256 is an apocalyptic number.

It is an amenable number.

680404256 is an abundant number, since it is smaller than the sum of its proper divisors (850505824).

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

680404256 is a wasteful number, since it uses less digits than its factorization.

680404256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037536 (or 3037528 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 680404256 is about 26084.5597240973. The cubic root of 680404256 is about 879.5401592028.

The spelling of 680404256 in words is "six hundred eighty million, four hundred four thousand, two hundred fifty-six".