687605364 has 108 divisors (see below), whose sum is σ = 1851570084. Its totient is φ = 215115264.

The previous prime is 687605357. The next prime is 687605371. The reversal of 687605364 is 463506786.

687605364 is a `hidden beast` number, since 6 + 8 + 7 + 605 + 36 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (687605357) and next prime (687605371).

It can be written as a sum of positive squares in 2 ways, for example, as 193432464 + 494172900 = 13908^2 + 22230^2 .

It is a super-2 number, since 2×687605364² = 945602273203144992, 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 35 ways as a sum of consecutive naturals, for example, 2040204 + ... + 2040540.

Almost surely, 2^687605364 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 687605364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (925785042).

687605364 is an abundant number, since it is smaller than the sum of its proper divisors (1163964720).

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

687605364 is a wasteful number, since it uses less digits than its factorization.

687605364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 45.

The square root of 687605364 is about 26222.2303399234. The cubic root of 687605364 is about 882.6321689977.

The spelling of 687605364 in words is "six hundred eighty-seven million, six hundred five thousand, three hundred sixty-four".