63895986 has 128 divisors (see below), whose sum is σ = 179896320. Its totient is φ = 16465680.

The previous prime is 63895969. The next prime is 63895987. The reversal of 63895986 is 68959836.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63895987) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 503055 + ... + 503181.

It is an arithmetic number, because the mean of its divisors is an integer number (1405440).

Almost surely, 2^63895986 is an apocalyptic number.

63895986 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 63895986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89948160).

63895986 is an abundant number, since it is smaller than the sum of its proper divisors (116000334).

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

63895986 is a wasteful number, since it uses less digits than its factorization.

63895986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 150 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 63895986 is about 7993.4964815155. The cubic root of 63895986 is about 399.7831866678.

The spelling of 63895986 in words is "sixty-three million, eight hundred ninety-five thousand, nine hundred eighty-six".