3638978322 has 16 divisors (see below), whose sum is σ = 8317664832. Its totient is φ = 1039708080.

The previous prime is 3638978309. The next prime is 3638978323. The reversal of 3638978322 is 2238798363.

It is a happy number.

3638978322 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (3638978323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43321129 + ... + 43321212.

It is an arithmetic number, because the mean of its divisors is an integer number (519854052).

Almost surely, 2^3638978322 is an apocalyptic number.

3638978322 is an abundant number, since it is smaller than the sum of its proper divisors (4678686510).

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

3638978322 is a wasteful number, since it uses less digits than its factorization.

3638978322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86642353.

The product of its digits is 2612736, while the sum is 51.

The square root of 3638978322 is about 60323.9448477966. The cubic root of 3638978322 is about 1538.1304013875.

The spelling of 3638978322 in words is "three billion, six hundred thirty-eight million, nine hundred seventy-eight thousand, three hundred twenty-two".