686338832 has 20 divisors (see below), whose sum is σ = 1330188300. Its totient is φ = 343064448.

The previous prime is 686338823. The next prime is 686338859. The reversal of 686338832 is 238833686.

It can be written as a sum of positive squares in 2 ways, for example, as 251032336 + 435306496 = 15844^2 + 20864^2 .

It is a super-2 number, since 2×686338832² = 942121984622248448, which contains 22 as substring.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

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, 95294 + ... + 102242.

It is an arithmetic number, because the mean of its divisors is an integer number (66509415).

Almost surely, 2^686338832 is an apocalyptic number.

It is an amenable number.

686338832 is a deficient number, since it is larger than the sum of its proper divisors (643849468).

686338832 is a wasteful number, since it uses less digits than its factorization.

686338832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13130 (or 13124 counting only the distinct ones).

The product of its digits is 995328, while the sum is 47.

The square root of 686338832 is about 26198.0692418354. The cubic root of 686338832 is about 882.0899156416.

The spelling of 686338832 in words is "six hundred eighty-six million, three hundred thirty-eight thousand, eight hundred thirty-two".