63984864 has 48 divisors (see below), whose sum is σ = 168391440. Its totient is φ = 21273600.

The previous prime is 63984847. The next prime is 63984917. The reversal of 63984864 is 46848936.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57142 + ... + 58250.

It is an arithmetic number, because the mean of its divisors is an integer number (3508155).

Almost surely, 2^63984864 is an apocalyptic number.

It is an amenable number.

63984864 is an abundant number, since it is smaller than the sum of its proper divisors (104406576).

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

63984864 is a wasteful number, since it uses less digits than its factorization.

63984864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1723 (or 1715 counting only the distinct ones).

The product of its digits is 995328, while the sum is 48.

The square root of 63984864 is about 7999.0539440611. The cubic root of 63984864 is about 399.9684641805.

The spelling of 63984864 in words is "sixty-three million, nine hundred eighty-four thousand, eight hundred sixty-four".