63975720 has 64 divisors (see below), whose sum is σ = 192456000. Its totient is φ = 17013248.

The previous prime is 63975713. The next prime is 63975721. The reversal of 63975720 is 2757936.

It is not an unprimeable number, because it can be changed into a prime (63975721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78676 + ... + 79484.

It is an arithmetic number, because the mean of its divisors is an integer number (3007125).

Almost surely, 2^63975720 is an apocalyptic number.

63975720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63975720 is an abundant number, since it is smaller than the sum of its proper divisors (128480280).

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

63975720 is a wasteful number, since it uses less digits than its factorization.

63975720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482 (or 1478 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 63975720 is about 7998.4823560473. The cubic root of 63975720 is about 399.9494102686.

The spelling of 63975720 in words is "sixty-three million, nine hundred seventy-five thousand, seven hundred twenty".