680415956 has 48 divisors (see below), whose sum is σ = 1378399680. Its totient is φ = 290449920.

The previous prime is 680415937. The next prime is 680415971. The reversal of 680415956 is 659514086.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 529691 + ... + 530973.

It is an arithmetic number, because the mean of its divisors is an integer number (28716660).

Almost surely, 2^680415956 is an apocalyptic number.

It is an amenable number.

680415956 is an abundant number, since it is smaller than the sum of its proper divisors (697983724).

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

680415956 is a wasteful number, since it uses less digits than its factorization.

680415956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024 (or 2022 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 680415956 is about 26084.7839937386. The cubic root of 680415956 is about 879.5452005983.

The spelling of 680415956 in words is "six hundred eighty million, four hundred fifteen thousand, nine hundred fifty-six".