687979448 has 32 divisors (see below), whose sum is σ = 1408234800. Its totient is φ = 313175808.

The previous prime is 687979429. The next prime is 687979463. The reversal of 687979448 is 844979786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37718 + ... + 52901.

Almost surely, 2^687979448 is an apocalyptic number.

It is an amenable number.

687979448 is an abundant number, since it is smaller than the sum of its proper divisors (720255352).

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

687979448 is a wasteful number, since it uses less digits than its factorization.

687979448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90711 (or 90707 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 62.

The square root of 687979448 is about 26229.3623254550. The cubic root of 687979448 is about 882.7922020298.

The spelling of 687979448 in words is "six hundred eighty-seven million, nine hundred seventy-nine thousand, four hundred forty-eight".