687492404 has 12 divisors (see below), whose sum is σ = 1203388704. Its totient is φ = 343667064.

The previous prime is 687492401. The next prime is 687492419. The reversal of 687492404 is 404294786.

687492404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687492401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2567 + ... + 37169.

It is an arithmetic number, because the mean of its divisors is an integer number (100282392).

Almost surely, 2^687492404 is an apocalyptic number.

It is an amenable number.

687492404 is a deficient number, since it is larger than the sum of its proper divisors (515896300).

687492404 is a wasteful number, since it uses less digits than its factorization.

687492404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39574 (or 39572 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 44.

The square root of 687492404 is about 26220.0763538171. The cubic root of 687492404 is about 882.5838333315.

The spelling of 687492404 in words is "six hundred eighty-seven million, four hundred ninety-two thousand, four hundred four".