63011988 has 54 divisors (see below), whose sum is σ = 172491774. Its totient is φ = 19386432.

The previous prime is 63011987. The next prime is 63012017. The reversal of 63011988 is 88911036.

63011988 is a `hidden beast` number, since 630 + 1 + 19 + 8 + 8 = 666.

63011988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 144 + 63011844 = 12^2 + 7938^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63011987) 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 17 ways as a sum of consecutive naturals, for example, 906 + ... + 11262.

Almost surely, 2^63011988 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 63011988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86245887).

63011988 is an abundant number, since it is smaller than the sum of its proper divisors (109479786).

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

63011988 is a wasteful number, since it uses less digits than its factorization.

63011988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10393 (or 10375 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 63011988 is about 7938.0090702896. The cubic root of 63011988 is about 397.9309577804.

The spelling of 63011988 in words is "sixty-three million, eleven thousand, nine hundred eighty-eight".