63899320 has 64 divisors (see below), whose sum is σ = 150595200. Its totient is φ = 24376320.

The previous prime is 63899317. The next prime is 63899321. The reversal of 63899320 is 2399836.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63899321) 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, 76666 + ... + 77494.

It is an arithmetic number, because the mean of its divisors is an integer number (2353050).

Almost surely, 2^63899320 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 63899320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75297600).

63899320 is an abundant number, since it is smaller than the sum of its proper divisors (86695880).

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

63899320 is a wasteful number, since it uses less digits than its factorization.

63899320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928 (or 924 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 63899320 is about 7993.7050233293. The cubic root of 63899320 is about 399.7901399161.

The spelling of 63899320 in words is "sixty-three million, eight hundred ninety-nine thousand, three hundred twenty".