63998572 has 12 divisors (see below), whose sum is σ = 122179176. Its totient is φ = 29090240.

The previous prime is 63998569. The next prime is 63998579. The reversal of 63998572 is 27589936.

It is not an unprimeable number, because it can be changed into a prime (63998579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 727213 + ... + 727300.

It is an arithmetic number, because the mean of its divisors is an integer number (10181598).

Almost surely, 2^63998572 is an apocalyptic number.

It is an amenable number.

63998572 is a deficient number, since it is larger than the sum of its proper divisors (58180604).

63998572 is a wasteful number, since it uses less digits than its factorization.

63998572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454528 (or 1454526 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The square root of 63998572 is about 7999.9107495021. The cubic root of 63998572 is about 399.9970249779.

The spelling of 63998572 in words is "sixty-three million, nine hundred ninety-eight thousand, five hundred seventy-two".