63888986 has 16 divisors (see below), whose sum is σ = 114286464. Its totient is φ = 26190384.

The previous prime is 63888977. The next prime is 63888997. The reversal of 63888986 is 68988836.

It is a super-4 number, since 4×63888986⁴ (a number of 32 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98885 + ... + 99528.

It is an arithmetic number, because the mean of its divisors is an integer number (7142904).

Almost surely, 2^63888986 is an apocalyptic number.

63888986 is a deficient number, since it is larger than the sum of its proper divisors (50397478).

63888986 is a wasteful number, since it uses less digits than its factorization.

63888986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198445.

The product of its digits is 3981312, while the sum is 56.

The square root of 63888986 is about 7993.0586135722. The cubic root of 63888986 is about 399.7685869792.

The spelling of 63888986 in words is "sixty-three million, eight hundred eighty-eight thousand, nine hundred eighty-six".