63809868 has 24 divisors (see below), whose sum is σ = 149180080. Its totient is φ = 21228480.

The previous prime is 63809861. The next prime is 63809887. The reversal of 63809868 is 86890836.

It is not an unprimeable number, because it can be changed into a prime (63809861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1578 + ... + 11406.

Almost surely, 2^63809868 is an apocalyptic number.

It is an amenable number.

63809868 is an abundant number, since it is smaller than the sum of its proper divisors (85370212).

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

63809868 is a wasteful number, since it uses less digits than its factorization.

63809868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10377 (or 10375 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 63809868 is about 7988.1079111389. The cubic root of 63809868 is about 399.6034987635.

The spelling of 63809868 in words is "sixty-three million, eight hundred nine thousand, eight hundred sixty-eight".