686428064 has 48 divisors (see below), whose sum is σ = 1576008000. Its totient is φ = 294178752.

The previous prime is 686428051. The next prime is 686428073. The reversal of 686428064 is 460824686.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20294 + ... + 42245.

It is an arithmetic number, because the mean of its divisors is an integer number (32833500).

Almost surely, 2^686428064 is an apocalyptic number.

It is an amenable number.

686428064 is an abundant number, since it is smaller than the sum of its proper divisors (889579936).

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

686428064 is an equidigital number, since it uses as much as digits as its factorization.

686428064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62570 (or 62548 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 686428064 is about 26199.7722127502. The cubic root of 686428064 is about 882.1281412880.

The spelling of 686428064 in words is "six hundred eighty-six million, four hundred twenty-eight thousand, sixty-four".