2638489112 has 128 divisors (see below), whose sum is σ = 6193152000. Its totient is φ = 1028350080.

The previous prime is 2638489111. The next prime is 2638489123. The reversal of 2638489112 is 2119848362.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2638489111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5508089 + ... + 5508567.

It is an arithmetic number, because the mean of its divisors is an integer number (48384000).

Almost surely, 2^2638489112 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 2638489112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3096576000).

2638489112 is an abundant number, since it is smaller than the sum of its proper divisors (3554662888).

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

2638489112 is a wasteful number, since it uses less digits than its factorization.

2638489112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 705 counting only the distinct ones).

The product of its digits is 165888, while the sum is 44.

The square root of 2638489112 is about 51366.2254015224. The cubic root of 2638489112 is about 1381.8209372154.

The spelling of 2638489112 in words is "two billion, six hundred thirty-eight million, four hundred eighty-nine thousand, one hundred twelve".