686621276 has 36 divisors (see below), whose sum is σ = 1323211680. Its totient is φ = 311520000.

The previous prime is 686621269. The next prime is 686621303. The reversal of 686621276 is 672126686.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 362540 + ... + 364428.

It is an arithmetic number, because the mean of its divisors is an integer number (36755880).

Almost surely, 2^686621276 is an apocalyptic number.

It is an amenable number.

686621276 is a deficient number, since it is larger than the sum of its proper divisors (636590404).

686621276 is a wasteful number, since it uses less digits than its factorization.

686621276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2666 (or 2653 counting only the distinct ones).

The product of its digits is 290304, while the sum is 44.

The square root of 686621276 is about 26203.4592372839. The cubic root of 686621276 is about 882.2108990513.

The spelling of 686621276 in words is "six hundred eighty-six million, six hundred twenty-one thousand, two hundred seventy-six".