685846980 has 384 divisors, whose sum is σ = 2784015360. Its totient is φ = 136028160.

The previous prime is 685846979. The next prime is 685846991. The reversal of 685846980 is 89648586.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 834970 + ... + 835790.

It is an arithmetic number, because the mean of its divisors is an integer number (7250040).

Almost surely, 2^685846980 is an apocalyptic number.

685846980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685846980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1392007680).

685846980 is an abundant number, since it is smaller than the sum of its proper divisors (2098168380).

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

685846980 is a wasteful number, since it uses less digits than its factorization.

685846980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The square root of 685846980 is about 26188.6803791256. The cubic root of 685846980 is about 881.8791541592.

The spelling of 685846980 in words is "six hundred eighty-five million, eight hundred forty-six thousand, nine hundred eighty".