63900440 has 32 divisors (see below), whose sum is σ = 150029280. Its totient is φ = 24448512.

The previous prime is 63900437. The next prime is 63900461. The reversal of 63900440 is 4400936.

63900440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 33809 + ... + 35648.

It is an arithmetic number, because the mean of its divisors is an integer number (4688415).

Almost surely, 2^63900440 is an apocalyptic number.

It is an amenable number.

63900440 is an abundant number, since it is smaller than the sum of its proper divisors (86128840).

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

63900440 is a wasteful number, since it uses less digits than its factorization.

63900440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69491 (or 69487 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 63900440 is about 7993.7750781467. The cubic root of 63900440 is about 399.7924756861.

The spelling of 63900440 in words is "sixty-three million, nine hundred thousand, four hundred forty".