2644111988 has 36 divisors (see below), whose sum is σ = 5356364832. Its totient is φ = 1118772720.

The previous prime is 2644111961. The next prime is 2644111997. The reversal of 2644111988 is 8891114462.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 167183 + ... + 182313.

It is an arithmetic number, because the mean of its divisors is an integer number (148787912).

Almost surely, 2^2644111988 is an apocalyptic number.

2644111988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2644111988 is an abundant number, since it is smaller than the sum of its proper divisors (2712252844).

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

2644111988 is a wasteful number, since it uses less digits than its factorization.

2644111988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15300 (or 15219 counting only the distinct ones).

The product of its digits is 110592, while the sum is 44.

The square root of 2644111988 is about 51420.9294742909. The cubic root of 2644111988 is about 1382.8018388571.

The spelling of 2644111988 in words is "two billion, six hundred forty-four million, one hundred eleven thousand, nine hundred eighty-eight".