63963520 has 64 divisors (see below), whose sum is σ = 161935200. Its totient is φ = 24076288.

The previous prime is 63963511. The next prime is 63963521. The reversal of 63963520 is 2536936.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63963521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7941 + ... + 13819.

Almost surely, 2^63963520 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 63963520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80967600).

63963520 is an abundant number, since it is smaller than the sum of its proper divisors (97971680).

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

63963520 is a wasteful number, since it uses less digits than its factorization.

63963520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5915 (or 5903 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 34.

The square root of 63963520 is about 7997.7196750074. The cubic root of 63963520 is about 399.9239855554.

The spelling of 63963520 in words is "sixty-three million, nine hundred sixty-three thousand, five hundred twenty".