2044406640 has 80 divisors (see below), whose sum is σ = 6445123200. Its totient is φ = 535931136.

The previous prime is 2044406633. The next prime is 2044406701. The reversal of 2044406640 is 466044402.

2044406640 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2044406598 and 2044406607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58030 + ... + 86349.

It is an arithmetic number, because the mean of its divisors is an integer number (80564040).

Almost surely, 2^2044406640 is an apocalyptic number.

2044406640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2044406640 is an abundant number, since it is smaller than the sum of its proper divisors (4400716560).

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

2044406640 is a wasteful number, since it uses less digits than its factorization.

2044406640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144454 (or 144448 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

The square root of 2044406640 is about 45215.1151718095. The cubic root of 2044406640 is about 1269.1776849621.

The spelling of 2044406640 in words is "two billion, forty-four million, four hundred six thousand, six hundred forty".