2644040080 has 40 divisors (see below), whose sum is σ = 6706249344. Its totient is φ = 961468800.

The previous prime is 2644040041. The next prime is 2644040089. The reversal of 2644040080 is 800404462.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (2644040089) 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, 1501416 + ... + 1503175.

Almost surely, 2^2644040080 is an apocalyptic number.

2644040080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2644040080 is an abundant number, since it is smaller than the sum of its proper divisors (4062209264).

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

2644040080 is a wasteful number, since it uses less digits than its factorization.

2644040080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004615 (or 3004609 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 2644040080 is about 51420.2302600834. The cubic root of 2644040080 is about 1382.7893034052.

The spelling of 2644040080 in words is "two billion, six hundred forty-four million, forty thousand, eighty".