63399960 has 384 divisors, whose sum is σ = 251596800. Its totient is φ = 13685760.

The previous prime is 63399943. The next prime is 63399971. The reversal of 63399960 is 6999336.

63399960 is a `hidden beast` number, since 633 + 9 + 9 + 9 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2045145 + ... + 2045175.

It is an arithmetic number, because the mean of its divisors is an integer number (655200).

Almost surely, 2^63399960 is an apocalyptic number.

63399960 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 63399960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125798400).

63399960 is an abundant number, since it is smaller than the sum of its proper divisors (188196840).

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

63399960 is a wasteful number, since it uses less digits than its factorization.

63399960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 45.

The square root of 63399960 is about 7962.4091831556. The cubic root of 63399960 is about 398.7459894186.

The spelling of 63399960 in words is "sixty-three million, three hundred ninety-nine thousand, nine hundred sixty".