63899444 has 36 divisors (see below), whose sum is σ = 131425056. Its totient is φ = 26629344.

The previous prime is 63899417. The next prime is 63899467. The reversal of 63899444 is 44499836.

It is a happy number.

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, 37499 + ... + 39165.

It is an arithmetic number, because the mean of its divisors is an integer number (3650696).

Almost surely, 2^63899444 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 63899444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65712528).

63899444 is an abundant number, since it is smaller than the sum of its proper divisors (67525612).

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

63899444 is a wasteful number, since it uses less digits than its factorization.

63899444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752 (or 1713 counting only the distinct ones).

The product of its digits is 746496, while the sum is 47.

The square root of 63899444 is about 7993.7127794286. The cubic root of 63899444 is about 399.7903985206.

The spelling of 63899444 in words is "sixty-three million, eight hundred ninety-nine thousand, four hundred forty-four".