63940608 has 72 divisors (see below), whose sum is σ = 184725450. Its totient is φ = 21307392.

The previous prime is 63940573. The next prime is 63940637. The reversal of 63940608 is 80604936.

63940608 is a `hidden beast` number, since 6 + 3 + 9 + 40 + 608 = 666.

It can be written as a sum of positive squares in only one way, i.e., 63489024 + 451584 = 7968^2 + 672^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

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, 16698 + ... + 20166.

Almost surely, 2^63940608 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 63940608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92362725).

63940608 is an abundant number, since it is smaller than the sum of its proper divisors (120784842).

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

63940608 is a wasteful number, since it uses less digits than its factorization.

63940608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497 (or 3474 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 63940608 is about 7996.2871384162. The cubic root of 63940608 is about 399.8762283721.

The spelling of 63940608 in words is "sixty-three million, nine hundred forty thousand, six hundred eight".