687860112400 has 120 divisors (see below), whose sum is σ = 1691595775584. Its totient is φ = 268653235200.

The previous prime is 687860112391. The next prime is 687860112437. The reversal of 687860112400 is 4211068786.

It is a Harshad number since it is a multiple of its sum of digits (43).

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, 72424452 + ... + 72433948.

Almost surely, 2^687860112400 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 687860112400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (845797887792).

687860112400 is an abundant number, since it is smaller than the sum of its proper divisors (1003735663184).

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

687860112400 is a wasteful number, since it uses less digits than its factorization.

687860112400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13769 (or 13758 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 687860112400 in words is "six hundred eighty-seven billion, eight hundred sixty million, one hundred twelve thousand, four hundred".