686672590 has 32 divisors (see below), whose sum is σ = 1319763456. Its totient is φ = 256613280.

The previous prime is 686672563. The next prime is 686672671. The reversal of 686672590 is 95276686.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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, 24826 + ... + 44605.

It is an arithmetic number, because the mean of its divisors is an integer number (41242608).

Almost surely, 2^686672590 is an apocalyptic number.

686672590 is a deficient number, since it is larger than the sum of its proper divisors (633090866).

686672590 is a wasteful number, since it uses less digits than its factorization.

686672590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69504.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The square root of 686672590 is about 26204.4383645214. The cubic root of 686672590 is about 882.2328755731.

The spelling of 686672590 in words is "six hundred eighty-six million, six hundred seventy-two thousand, five hundred ninety".