684716920 has 32 divisors (see below), whose sum is σ = 1541675520. Its totient is φ = 273697920.

The previous prime is 684716891. The next prime is 684716983. The reversal of 684716920 is 29617486.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62665 + ... + 72775.

It is an arithmetic number, because the mean of its divisors is an integer number (48177360).

Almost surely, 2^684716920 is an apocalyptic number.

It is an amenable number.

684716920 is an abundant number, since it is smaller than the sum of its proper divisors (856958600).

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

684716920 is a wasteful number, since it uses less digits than its factorization.

684716920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11815 (or 11811 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 684716920 is about 26167.0961323568. The cubic root of 684716920 is about 881.3945347831.

The spelling of 684716920 in words is "six hundred eighty-four million, seven hundred sixteen thousand, nine hundred twenty".