63920172 has 12 divisors (see below), whose sum is σ = 149147096. Its totient is φ = 21306720.

The previous prime is 63920167. The next prime is 63920179. The reversal of 63920172 is 27102936.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (63920179) 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, 2663329 + ... + 2663352.

Almost surely, 2^63920172 is an apocalyptic number.

It is an amenable number.

63920172 is an abundant number, since it is smaller than the sum of its proper divisors (85226924).

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

63920172 is a wasteful number, since it uses less digits than its factorization.

63920172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5326688 (or 5326686 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 63920172 is about 7995.0091932405. The cubic root of 63920172 is about 399.8336224726.

The spelling of 63920172 in words is "sixty-three million, nine hundred twenty thousand, one hundred seventy-two".