684088680 has 64 divisors (see below), whose sum is σ = 2238840000. Its totient is φ = 165839360.

The previous prime is 684088667. The next prime is 684088697. The reversal of 684088680 is 86880486.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257805 + ... + 260444.

It is an arithmetic number, because the mean of its divisors is an integer number (34981875).

Almost surely, 2^684088680 is an apocalyptic number.

684088680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

684088680 is an abundant number, since it is smaller than the sum of its proper divisors (1554751320).

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

684088680 is a wasteful number, since it uses less digits than its factorization.

684088680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518274 (or 518270 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 48.

The square root of 684088680 is about 26155.0889885697. The cubic root of 684088680 is about 881.1248872230.

The spelling of 684088680 in words is "six hundred eighty-four million, eighty-eight thousand, six hundred eighty".