63872136 has 24 divisors (see below), whose sum is σ = 172987230. Its totient is φ = 21290688.

The previous prime is 63872131. The next prime is 63872177. The reversal of 63872136 is 63127836.

It is a happy number.

63872136 is a `hidden beast` number, since 638 + 7 + 2 + 13 + 6 = 666.

63872136 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 only one way, i.e., 54908100 + 8964036 = 7410^2 + 2994^2 .

It is a tau number, because it is divible by the number of its divisors (24).

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

It is a self number, because there is not a number n which added to its sum of digits gives 63872136.

It is not an unprimeable number, because it can be changed into a prime (63872131) 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 5 ways as a sum of consecutive naturals, for example, 443485 + ... + 443628.

Almost surely, 2^63872136 is an apocalyptic number.

It is an amenable number.

63872136 is an abundant number, since it is smaller than the sum of its proper divisors (109115094).

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

63872136 is a wasteful number, since it uses less digits than its factorization.

63872136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887125 (or 887118 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 63872136 is about 7992.0045045032. The cubic root of 63872136 is about 399.7334390693.

The spelling of 63872136 in words is "sixty-three million, eight hundred seventy-two thousand, one hundred thirty-six".