687457368 has 160 divisors (see below), whose sum is σ = 2101915200. Its totient is φ = 208645632.

The previous prime is 687457363. The next prime is 687457387. The reversal of 687457368 is 863754786.

687457368 is a `hidden beast` number, since 6 + 8 + 7 + 4 + 573 + 68 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687457363) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 664980 + ... + 666012.

It is an arithmetic number, because the mean of its divisors is an integer number (13136970).

Almost surely, 2^687457368 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 687457368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050957600).

687457368 is an abundant number, since it is smaller than the sum of its proper divisors (1414457832).

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

687457368 is a wasteful number, since it uses less digits than its factorization.

687457368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143 (or 1130 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 54.

The square root of 687457368 is about 26219.4082313083. The cubic root of 687457368 is about 882.5688403259.

The spelling of 687457368 in words is "six hundred eighty-seven million, four hundred fifty-seven thousand, three hundred sixty-eight".