687415404 has 24 divisors (see below), whose sum is σ = 1727351920. Its totient is φ = 211512384.

The previous prime is 687415387. The next prime is 687415409. The reversal of 687415404 is 404514786.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (687415409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2203099 + ... + 2203410.

Almost surely, 2^687415404 is an apocalyptic number.

It is an amenable number.

687415404 is an abundant number, since it is smaller than the sum of its proper divisors (1039936516).

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

687415404 is a wasteful number, since it uses less digits than its factorization.

687415404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4406529 (or 4406527 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The square root of 687415404 is about 26218.6079722017. The cubic root of 687415404 is about 882.5508819408.

The spelling of 687415404 in words is "six hundred eighty-seven million, four hundred fifteen thousand, four hundred four".