63913728 has 36 divisors (see below), whose sum is σ = 170105768. Its totient is φ = 21304320.

The previous prime is 63913691. The next prime is 63913741. The reversal of 63913728 is 82731936.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40843 + ... + 42378.

Almost surely, 2^63913728 is an apocalyptic number.

It is an amenable number.

63913728 is an abundant number, since it is smaller than the sum of its proper divisors (106192040).

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

63913728 is an equidigital number, since it uses as much as digits as its factorization.

63913728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83240 (or 83226 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 63913728 is about 7994.6061816702. The cubic root of 63913728 is about 399.8201858460.

The spelling of 63913728 in words is "sixty-three million, nine hundred thirteen thousand, seven hundred twenty-eight".