685516980 has 48 divisors (see below), whose sum is σ = 1920905280. Its totient is φ = 182665728.

The previous prime is 685516973. The next prime is 685517011. The reversal of 685516980 is 89615586.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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 15 ways as a sum of consecutive naturals, for example, 93612 + ... + 100668.

It is an arithmetic number, because the mean of its divisors is an integer number (40018860).

Almost surely, 2^685516980 is an apocalyptic number.

685516980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

685516980 is an abundant number, since it is smaller than the sum of its proper divisors (1235388300).

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

685516980 is a wasteful number, since it uses less digits than its factorization.

685516980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8688 (or 8686 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The square root of 685516980 is about 26182.3791890653. The cubic root of 685516980 is about 881.7376907243.

The spelling of 685516980 in words is "six hundred eighty-five million, five hundred sixteen thousand, nine hundred eighty".