63983856 has 20 divisors (see below), whose sum is σ = 165291752. Its totient is φ = 21327936.

The previous prime is 63983839. The next prime is 63983863. The reversal of 63983856 is 65838936.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 1332997 = 63983856 / (6 + 3 + 9 + 8 + 3 + 8 + 5 + 6).

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 3 ways as a sum of consecutive naturals, for example, 666451 + ... + 666546.

Almost surely, 2^63983856 is an apocalyptic number.

It is an amenable number.

63983856 is an abundant number, since it is smaller than the sum of its proper divisors (101307896).

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

63983856 is a wasteful number, since it uses less digits than its factorization.

63983856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333008 (or 1333002 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The square root of 63983856 is about 7998.9909363619. The cubic root of 63983856 is about 399.9663638383.

The spelling of 63983856 in words is "sixty-three million, nine hundred eighty-three thousand, eight hundred fifty-six".