686755320 has 64 divisors (see below), whose sum is σ = 2065180320. Its totient is φ = 182697984.

The previous prime is 686755319. The next prime is 686755373. The reversal of 686755320 is 23557686.

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, 45352 + ... + 58568.

Almost surely, 2^686755320 is an apocalyptic number.

686755320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

686755320 is an abundant number, since it is smaller than the sum of its proper divisors (1378425000).

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

686755320 is a wasteful number, since it uses less digits than its factorization.

686755320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13664 (or 13660 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The square root of 686755320 is about 26206.0168663611. The cubic root of 686755320 is about 882.2683044883.

The spelling of 686755320 in words is "six hundred eighty-six million, seven hundred fifty-five thousand, three hundred twenty".