686986764 has 24 divisors (see below), whose sum is σ = 1604320368. Its totient is φ = 228802560.

The previous prime is 686986763. The next prime is 686986787. The reversal of 686986764 is 467689686.

It is a super-2 number, since 2×686986764² = 943901627822383392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 686986698 and 686986707.

It is not an unprimeable number, because it can be changed into a prime (686986763) by changing a digit.

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, 8917 + ... + 38124.

It is an arithmetic number, because the mean of its divisors is an integer number (66846682).

Almost surely, 2^686986764 is an apocalyptic number.

It is an amenable number.

686986764 is an abundant number, since it is smaller than the sum of its proper divisors (917333604).

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

686986764 is a wasteful number, since it uses less digits than its factorization.

686986764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48265 (or 48263 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 60.

The square root of 686986764 is about 26210.4323504974. The cubic root of 686986764 is about 882.3674046894.

The spelling of 686986764 in words is "six hundred eighty-six million, nine hundred eighty-six thousand, seven hundred sixty-four".