680981724 has 36 divisors (see below), whose sum is σ = 1725403680. Its totient is φ = 226462080.

The previous prime is 680981671. The next prime is 680981753. The reversal of 680981724 is 427189086.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×680981724² = 927472216844024352, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 680981724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6429 + ... + 37460.

It is an arithmetic number, because the mean of its divisors is an integer number (47927880).

Almost surely, 2^680981724 is an apocalyptic number.

It is an amenable number.

680981724 is an abundant number, since it is smaller than the sum of its proper divisors (1044421956).

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

680981724 is a wasteful number, since it uses less digits than its factorization.

680981724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44330 (or 44325 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 680981724 is about 26095.6265301295. The cubic root of 680981724 is about 879.7889145914.

The spelling of 680981724 in words is "six hundred eighty million, nine hundred eighty-one thousand, seven hundred twenty-four".