687336408 has 64 divisors (see below), whose sum is σ = 2082844800. Its totient is φ = 208283040.

The previous prime is 687336389. The next prime is 687336421. The reversal of 687336408 is 804633786.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142266 + ... + 147017.

It is an arithmetic number, because the mean of its divisors is an integer number (32544450).

Almost surely, 2^687336408 is an apocalyptic number.

It is an amenable number.

687336408 is an abundant number, since it is smaller than the sum of its proper divisors (1395508392).

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

687336408 is a wasteful number, since it uses less digits than its factorization.

687336408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289309 (or 289299 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The square root of 687336408 is about 26217.1014416163. The cubic root of 687336408 is about 882.5170738243.

The spelling of 687336408 in words is "six hundred eighty-seven million, three hundred thirty-six thousand, four hundred eight".