2638344772 has 48 divisors (see below), whose sum is σ = 5376752640. Its totient is φ = 1109354400.

The previous prime is 2638344739. The next prime is 2638344773. The reversal of 2638344772 is 2774438362.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2638344773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1041147 + ... + 1043677.

It is an arithmetic number, because the mean of its divisors is an integer number (112015680).

Almost surely, 2^2638344772 is an apocalyptic number.

It is an amenable number.

2638344772 is an abundant number, since it is smaller than the sum of its proper divisors (2738407868).

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

2638344772 is a wasteful number, since it uses less digits than its factorization.

2638344772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232 (or 3230 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 46.

The square root of 2638344772 is about 51364.8203734813. The cubic root of 2638344772 is about 1381.7957389974.

The spelling of 2638344772 in words is "two billion, six hundred thirty-eight million, three hundred forty-four thousand, seven hundred seventy-two".