63878568 has 64 divisors (see below), whose sum is σ = 175271040. Its totient is φ = 19279104.

The previous prime is 63878557. The next prime is 63878599. The reversal of 63878568 is 86587836.

It is a self number, because there is not a number n which added to its sum of digits gives 63878568.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14605 + ... + 18467.

It is an arithmetic number, because the mean of its divisors is an integer number (2738610).

Almost surely, 2^63878568 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 63878568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87635520).

63878568 is an abundant number, since it is smaller than the sum of its proper divisors (111392472).

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

63878568 is a wasteful number, since it uses less digits than its factorization.

63878568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938 (or 3934 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 63878568 is about 7992.4068965487. The cubic root of 63878568 is about 399.7468564964.

It can be divided in two parts, 63878 and 568, that added together give a palindrome (64446).

The spelling of 63878568 in words is "sixty-three million, eight hundred seventy-eight thousand, five hundred sixty-eight".