686912880 has 160 divisors (see below), whose sum is σ = 2327851008. Its totient is φ = 166809600.

The previous prime is 686912873. The next prime is 686912899. The reversal of 686912880 is 88219686.

686912880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123765 + ... + 129195.

Almost surely, 2^686912880 is an apocalyptic number.

686912880 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 686912880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1163925504).

686912880 is an abundant number, since it is smaller than the sum of its proper divisors (1640938128).

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

686912880 is a wasteful number, since it uses less digits than its factorization.

686912880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5495 (or 5489 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 48.

The square root of 686912880 is about 26209.0228738120. The cubic root of 686912880 is about 882.3357712946.

The spelling of 686912880 in words is "six hundred eighty-six million, nine hundred twelve thousand, eight hundred eighty".