63604840 has 72 divisors (see below), whose sum is σ = 156580290. Its totient is φ = 23242752.

The previous prime is 63604819. The next prime is 63604843. The reversal of 63604840 is 4840636.

It can be written as a sum of positive squares in 9 ways, for example, as 910116 + 62694724 = 954^2 + 7918^2 .

It is not an unprimeable number, because it can be changed into a prime (63604843) 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 17 ways as a sum of consecutive naturals, for example, 655672 + ... + 655768.

Almost surely, 2^63604840 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 63604840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78290145).

63604840 is an abundant number, since it is smaller than the sum of its proper divisors (92975450).

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

63604840 is a wasteful number, since it uses less digits than its factorization.

63604840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 63604840 is about 7975.2642589447. The cubic root of 63604840 is about 399.1750498126.

The spelling of 63604840 in words is "sixty-three million, six hundred four thousand, eight hundred forty".