63643984 has 30 divisors (see below), whose sum is σ = 125482110. Its totient is φ = 31271040.

The previous prime is 63643927. The next prime is 63644011. The reversal of 63643984 is 48934636.

It can be written as a sum of positive squares in 3 ways, for example, as 3240000 + 60403984 = 1800^2 + 7772^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63643984.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59002 + ... + 60070.

It is an arithmetic number, because the mean of its divisors is an integer number (4182737).

Almost surely, 2^63643984 is an apocalyptic number.

It is an amenable number.

63643984 is a deficient number, since it is larger than the sum of its proper divisors (61838126).

63643984 is a wasteful number, since it uses less digits than its factorization.

63643984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199 (or 1132 counting only the distinct ones).

The product of its digits is 373248, while the sum is 43.

The square root of 63643984 is about 7977.7179694446. The cubic root of 63643984 is about 399.2569204367.

The spelling of 63643984 in words is "sixty-three million, six hundred forty-three thousand, nine hundred eighty-four".