63440568 has 24 divisors (see below), whose sum is σ = 171818400. Its totient is φ = 21146832.

The previous prime is 63440551. The next prime is 63440569. The reversal of 63440568 is 86504436.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63440569) by changing a digit.

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, 440488 + ... + 440631.

It is an arithmetic number, because the mean of its divisors is an integer number (7159100).

Almost surely, 2^63440568 is an apocalyptic number.

It is an amenable number.

63440568 is an abundant number, since it is smaller than the sum of its proper divisors (108377832).

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

63440568 is a wasteful number, since it uses less digits than its factorization.

63440568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881131 (or 881124 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 63440568 is about 7964.9587569554. The cubic root of 63440568 is about 398.8311042004.

The spelling of 63440568 in words is "sixty-three million, four hundred forty thousand, five hundred sixty-eight".