687974072 has 16 divisors (see below), whose sum is σ = 1331563200. Its totient is φ = 332890560.

The previous prime is 687974069. The next prime is 687974083. The reversal of 687974072 is 270479786.

It is a super-2 number, since 2×687974072² = 946616647488522368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 687974072.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1386797 + ... + 1387292.

It is an arithmetic number, because the mean of its divisors is an integer number (83222700).

Almost surely, 2^687974072 is an apocalyptic number.

687974072 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

687974072 is a deficient number, since it is larger than the sum of its proper divisors (643589128).

687974072 is a wasteful number, since it uses less digits than its factorization.

687974072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2774126 (or 2774122 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 50.

The square root of 687974072 is about 26229.2598446849. The cubic root of 687974072 is about 882.7899025894.

The spelling of 687974072 in words is "six hundred eighty-seven million, nine hundred seventy-four thousand, seventy-two".