687360856 has 96 divisors (see below), whose sum is σ = 1623283200. Its totient is φ = 267096960.

The previous prime is 687360841. The next prime is 687360887. The reversal of 687360856 is 658063786.

It is a happy number.

It is a super-2 number, since 2×687360856² = 944929892722105472, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 557761 + ... + 558991.

It is an arithmetic number, because the mean of its divisors is an integer number (16909200).

Almost surely, 2^687360856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687360856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (811641600).

687360856 is an abundant number, since it is smaller than the sum of its proper divisors (935922344).

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

687360856 is a wasteful number, since it uses less digits than its factorization.

687360856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329 (or 1312 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The square root of 687360856 is about 26217.5676980150. The cubic root of 687360856 is about 882.5275371730.

The spelling of 687360856 in words is "six hundred eighty-seven million, three hundred sixty thousand, eight hundred fifty-six".