63891072 has 256 divisors, whose sum is σ = 228480000. Its totient is φ = 17169408.

The previous prime is 63891067. The next prime is 63891073. The reversal of 63891072 is 27019836.

63891072 is a `hidden beast` number, since 638 + 9 + 10 + 7 + 2 = 666.

63891072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (63891073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459579 + ... + 459717.

It is an arithmetic number, because the mean of its divisors is an integer number (892500).

Almost surely, 2^63891072 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 63891072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114240000).

63891072 is an abundant number, since it is smaller than the sum of its proper divisors (164588928).

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

63891072 is a wasteful number, since it uses less digits than its factorization.

63891072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 63891072 is about 7993.1891007282. The cubic root of 63891072 is about 399.7729377979.

The spelling of 63891072 in words is "sixty-three million, eight hundred ninety-one thousand, seventy-two".