686373504 has 64 divisors (see below), whose sum is σ = 1930443840. Its totient is φ = 215330816.

The previous prime is 686373503. The next prime is 686373509. The reversal of 686373504 is 405373686.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×686373504² = 942217173986476032, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (686373503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46044 + ... + 59099.

It is an arithmetic number, because the mean of its divisors is an integer number (30163185).

Almost surely, 2^686373504 is an apocalyptic number.

686373504 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

686373504 is an abundant number, since it is smaller than the sum of its proper divisors (1244070336).

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

686373504 is a wasteful number, since it uses less digits than its factorization.

686373504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105177 (or 105165 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The square root of 686373504 is about 26198.7309616325. The cubic root of 686373504 is about 882.1047689984.

The spelling of 686373504 in words is "six hundred eighty-six million, three hundred seventy-three thousand, five hundred four".