63281984 has 28 divisors (see below), whose sum is σ = 127711200. Its totient is φ = 31102848.

The previous prime is 63281971. The next prime is 63282001. The reversal of 63281984 is 48918236.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4604 + ... + 12155.

Almost surely, 2^63281984 is an apocalyptic number.

63281984 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

63281984 is an abundant number, since it is smaller than the sum of its proper divisors (64429216).

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

63281984 is a wasteful number, since it uses less digits than its factorization.

63281984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16830 (or 16820 counting only the distinct ones).

The product of its digits is 82944, while the sum is 41.

The square root of 63281984 is about 7954.9974230040. The cubic root of 63281984 is about 398.4985041613.

Adding to 63281984 its sum of digits (41), we get a square (63282025 = 7955²).

The spelling of 63281984 in words is "sixty-three million, two hundred eighty-one thousand, nine hundred eighty-four".