687630040 has 16 divisors (see below), whose sum is σ = 1547167680. Its totient is φ = 275052000.

The previous prime is 687630029. The next prime is 687630061. The reversal of 687630040 is 40036786.

It is a junction number, because it is equal to n+sod(n) for n = 687629978 and 687630005.

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, 8595336 + ... + 8595415.

It is an arithmetic number, because the mean of its divisors is an integer number (96697980).

Almost surely, 2^687630040 is an apocalyptic number.

It is an amenable number.

687630040 is an abundant number, since it is smaller than the sum of its proper divisors (859537640).

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

687630040 is a wasteful number, since it uses less digits than its factorization.

687630040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17190762 (or 17190758 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 687630040 is about 26222.7008525056. The cubic root of 687630040 is about 882.6427271716.

The spelling of 687630040 in words is "six hundred eighty-seven million, six hundred thirty thousand, forty".