63920128 has 72 divisors (see below), whose sum is σ = 135872100. Its totient is φ = 30052352.

The previous prime is 63920117. The next prime is 63920137. The reversal of 63920128 is 82102936.

It is a self number, because there is not a number n which added to its sum of digits gives 63920128.

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 5 ways as a sum of consecutive naturals, for example, 1083363 + ... + 1083421.

Almost surely, 2^63920128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63920128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67936050).

63920128 is an abundant number, since it is smaller than the sum of its proper divisors (71951972).

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

63920128 is an equidigital number, since it uses as much as digits as its factorization.

63920128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 63920128 is about 7995.0064415234. The cubic root of 63920128 is about 399.8335307296.

The spelling of 63920128 in words is "sixty-three million, nine hundred twenty thousand, one hundred twenty-eight".