63998064 has 120 divisors (see below), whose sum is σ = 204330672. Its totient is φ = 18524160.

The previous prime is 63998027. The next prime is 63998069. The reversal of 63998064 is 46089936.

63998064 is a `hidden beast` number, since 639 + 9 + 8 + 0 + 6 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63998069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30819 + ... + 32829.

Almost surely, 2^63998064 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 63998064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102165336).

63998064 is an abundant number, since it is smaller than the sum of its proper divisors (140332608).

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

63998064 is a wasteful number, since it uses less digits than its factorization.

63998064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2055 (or 2046 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 63998064 is about 7999.8789990849. The cubic root of 63998064 is about 399.9959666260.

The spelling of 63998064 in words is "sixty-three million, nine hundred ninety-eight thousand, sixty-four".