686873980 has 48 divisors (see below), whose sum is σ = 1586471040. Its totient is φ = 248214528.

The previous prime is 686873977. The next prime is 686873983. The reversal of 686873980 is 89378686.

It is an interprime number because it is at equal distance from previous prime (686873977) and next prime (686873983).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686873983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15885 + ... + 40324.

It is an arithmetic number, because the mean of its divisors is an integer number (33051480).

Almost surely, 2^686873980 is an apocalyptic number.

It is an amenable number.

686873980 is an abundant number, since it is smaller than the sum of its proper divisors (899597060).

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

686873980 is a wasteful number, since it uses less digits than its factorization.

686873980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56278 (or 56276 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 55.

The square root of 686873980 is about 26208.2807524645. The cubic root of 686873980 is about 882.3191153691.

The spelling of 686873980 in words is "six hundred eighty-six million, eight hundred seventy-three thousand, nine hundred eighty".