63881312 has 48 divisors (see below), whose sum is σ = 137858112. Its totient is φ = 28897920.

The previous prime is 63881299. The next prime is 63881333. The reversal of 63881312 is 21318836.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

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 7 ways as a sum of consecutive naturals, for example, 121883 + ... + 122405.

It is an arithmetic number, because the mean of its divisors is an integer number (2872044).

Almost surely, 2^63881312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63881312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68929056).

63881312 is an abundant number, since it is smaller than the sum of its proper divisors (73976800).

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

63881312 is a wasteful number, since it uses less digits than its factorization.

63881312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891 (or 883 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 63881312 is about 7992.5785576371. The cubic root of 63881312 is about 399.7525803236.

The spelling of 63881312 in words is "sixty-three million, eight hundred eighty-one thousand, three hundred twelve".