685586880 has 672 divisors, whose sum is σ = 2909986560. Its totient is φ = 145981440.

The previous prime is 685586879. The next prime is 685586929. The reversal of 685586880 is 88685586.

685586880 is a `hidden beast` number, since 6 + 8 + 558 + 6 + 8 + 80 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 10232607 + ... + 10232673.

Almost surely, 2^685586880 is an apocalyptic number.

685586880 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 685586880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1454993280).

685586880 is an abundant number, since it is smaller than the sum of its proper divisors (2224399680).

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

685586880 is a wasteful number, since it uses less digits than its factorization.

685586880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 54.

The square root of 685586880 is about 26183.7140222696. The cubic root of 685586880 is about 881.7676590410.

The spelling of 685586880 in words is "six hundred eighty-five million, five hundred eighty-six thousand, eight hundred eighty".