63989632 has 64 divisors (see below), whose sum is σ = 154297440. Its totient is φ = 25804800.

The previous prime is 63989617. The next prime is 63989641. The reversal of 63989632 is 23698936.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

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 7 ways as a sum of consecutive naturals, for example, 13132 + ... + 17332.

Almost surely, 2^63989632 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 63989632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77148720).

63989632 is an abundant number, since it is smaller than the sum of its proper divisors (90307808).

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

63989632 is a wasteful number, since it uses less digits than its factorization.

63989632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239 (or 4227 counting only the distinct ones).

The product of its digits is 419904, while the sum is 46.

The square root of 63989632 is about 7999.3519737539. The cubic root of 63989632 is about 399.9783988335.

It can be divided in two parts, 63 and 989632, that multiplied together give a square (62346816 = 7896²).

The spelling of 63989632 in words is "sixty-three million, nine hundred eighty-nine thousand, six hundred thirty-two".