63998488 has 8 divisors (see below), whose sum is σ = 119997180. Its totient is φ = 31999240.

The previous prime is 63998437. The next prime is 63998497. The reversal of 63998488 is 88489936.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×63998488² = 8191612932572288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3999898 + ... + 3999913.

Almost surely, 2^63998488 is an apocalyptic number.

It is an amenable number.

63998488 is a deficient number, since it is larger than the sum of its proper divisors (55998692).

63998488 is a wasteful number, since it uses less digits than its factorization.

63998488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7999817 (or 7999813 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 63998488 is about 7999.9054994419. The cubic root of 63998488 is about 399.9968499752.

The spelling of 63998488 in words is "sixty-three million, nine hundred ninety-eight thousand, four hundred eighty-eight".