63399872 has 28 divisors (see below), whose sum is σ = 128189736. Its totient is φ = 31100160.

The previous prime is 63399863. The next prime is 63399877. The reversal of 63399872 is 27899336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63399877) 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, 5954 + ... + 12737.

Almost surely, 2^63399872 is an apocalyptic number.

It is an amenable number.

63399872 is an abundant number, since it is smaller than the sum of its proper divisors (64789864).

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

63399872 is a wasteful number, since it uses less digits than its factorization.

63399872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18756 (or 18746 counting only the distinct ones).

The product of its digits is 489888, while the sum is 47.

The square root of 63399872 is about 7962.4036571879. The cubic root of 63399872 is about 398.7458049303.

The spelling of 63399872 in words is "sixty-three million, three hundred ninety-nine thousand, eight hundred seventy-two".