63978276 has 24 divisors (see below), whose sum is σ = 158064480. Its totient is φ = 20071552.

The previous prime is 63978269. The next prime is 63978289. The reversal of 63978276 is 67287936.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156606 + ... + 157013.

It is an arithmetic number, because the mean of its divisors is an integer number (6586020).

Almost surely, 2^63978276 is an apocalyptic number.

It is an amenable number.

63978276 is an abundant number, since it is smaller than the sum of its proper divisors (94086204).

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

63978276 is a wasteful number, since it uses less digits than its factorization.

63978276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313643 (or 313641 counting only the distinct ones).

The product of its digits is 762048, while the sum is 48.

The square root of 63978276 is about 7998.6421347626. The cubic root of 63978276 is about 399.9547365449.

The spelling of 63978276 in words is "sixty-three million, nine hundred seventy-eight thousand, two hundred seventy-six".