63899040 has 96 divisors (see below), whose sum is σ = 202487040. Its totient is φ = 16937984.

The previous prime is 63899023. The next prime is 63899047. The reversal of 63899040 is 4099836.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 63899040.

It is not an unprimeable number, because it can be changed into a prime (63899047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114442 + ... + 114998.

It is an arithmetic number, because the mean of its divisors is an integer number (2109240).

Almost surely, 2^63899040 is an apocalyptic number.

63899040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63899040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101243520).

63899040 is an abundant number, since it is smaller than the sum of its proper divisors (138588000).

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

63899040 is a wasteful number, since it uses less digits than its factorization.

63899040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 806 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 63899040 is about 7993.6875095290. The cubic root of 63899040 is about 399.7895559694.

The spelling of 63899040 in words is "sixty-three million, eight hundred ninety-nine thousand, forty".