63863680 has 32 divisors (see below), whose sum is σ = 152675640. Its totient is φ = 25545216.

The previous prime is 63863629. The next prime is 63863717. The reversal of 63863680 is 8636836.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (40).

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, 49254 + ... + 50533.

Almost surely, 2^63863680 is an apocalyptic number.

It is an amenable number.

63863680 is an abundant number, since it is smaller than the sum of its proper divisors (88811960).

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

63863680 is an equidigital number, since it uses as much as digits as its factorization.

63863680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99806 (or 99794 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 63863680 is about 7991.4754582618. The cubic root of 63863680 is about 399.7157981211.

The spelling of 63863680 in words is "sixty-three million, eight hundred sixty-three thousand, six hundred eighty".