680499740 has 12 divisors (see below), whose sum is σ = 1429049496. Its totient is φ = 272199888.

The previous prime is 680499737. The next prime is 680499751. The reversal of 680499740 is 47994086.

It is a super-2 number, since 2×680499740² = 926159792280135200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17012474 + ... + 17012513.

It is an arithmetic number, because the mean of its divisors is an integer number (119087458).

Almost surely, 2^680499740 is an apocalyptic number.

It is an amenable number.

680499740 is an abundant number, since it is smaller than the sum of its proper divisors (748549756).

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

680499740 is a wasteful number, since it uses less digits than its factorization.

680499740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34024996 (or 34024994 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 680499740 is about 26086.3899380501. The cubic root of 680499740 is about 879.5813004721.

The spelling of 680499740 in words is "six hundred eighty million, four hundred ninety-nine thousand, seven hundred forty".