63868536 has 48 divisors (see below), whose sum is σ = 174938400. Its totient is φ = 21048192.

The previous prime is 63868523. The next prime is 63868559. The reversal of 63868536 is 63586836.

63868536 is a `hidden beast` number, since 638 + 6 + 8 + 5 + 3 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 63868491 and 63868500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1425 + ... + 11391.

It is an arithmetic number, because the mean of its divisors is an integer number (3644550).

Almost surely, 2^63868536 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 63868536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87469200).

63868536 is an abundant number, since it is smaller than the sum of its proper divisors (111069864).

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

63868536 is a wasteful number, since it uses less digits than its factorization.

63868536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10068 (or 10061 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 63868536 is about 7991.7792762313. The cubic root of 63868536 is about 399.7259289222.

The spelling of 63868536 in words is "sixty-three million, eight hundred sixty-eight thousand, five hundred thirty-six".