63636872 has 48 divisors (see below), whose sum is σ = 131763660. Its totient is φ = 28642176.

The previous prime is 63636863. The next prime is 63636877. The reversal of 63636872 is 27863636.

It can be written as a sum of positive squares in 2 ways, for example, as 55145476 + 8491396 = 7426^2 + 2914^2 .

It is not an unprimeable number, because it can be changed into a prime (63636877) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 229598 + ... + 229874.

Almost surely, 2^63636872 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 63636872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65881830).

63636872 is an abundant number, since it is smaller than the sum of its proper divisors (68126788).

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

63636872 is a wasteful number, since it uses less digits than its factorization.

63636872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 339 counting only the distinct ones).

The product of its digits is 217728, while the sum is 41.

The square root of 63636872 is about 7977.2722154882. The cubic root of 63636872 is about 399.2420480125.

The spelling of 63636872 in words is "sixty-three million, six hundred thirty-six thousand, eight hundred seventy-two".