684279684 has 72 divisors (see below), whose sum is σ = 1950035360. Its totient is φ = 207353520.

The previous prime is 684279671. The next prime is 684279707. The reversal of 684279684 is 486972486.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 684279684.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13114 + ... + 39249.

Almost surely, 2^684279684 is an apocalyptic number.

It is an amenable number.

684279684 is an abundant number, since it is smaller than the sum of its proper divisors (1265755676).

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

684279684 is a wasteful number, since it uses less digits than its factorization.

684279684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52398 (or 52379 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The square root of 684279684 is about 26158.7401072758. The cubic root of 684279684 is about 881.2068857133.

The spelling of 684279684 in words is "six hundred eighty-four million, two hundred seventy-nine thousand, six hundred eighty-four".