2044778660 has 72 divisors (see below), whose sum is σ = 4535455680. Its totient is φ = 772905408.

The previous prime is 2044778657. The next prime is 2044778669. The reversal of 2044778660 is 668774402.

It is a super-2 number, since 2×2044778660² = 8362239536782791200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2044778669) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4879931 + ... + 4880349.

It is an arithmetic number, because the mean of its divisors is an integer number (62992440).

Almost surely, 2^2044778660 is an apocalyptic number.

2044778660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2044778660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2267727840).

2044778660 is an abundant number, since it is smaller than the sum of its proper divisors (2490677020).

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

2044778660 is a wasteful number, since it uses less digits than its factorization.

2044778660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657 (or 552 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 44.

The square root of 2044778660 is about 45219.2288744512. The cubic root of 2044778660 is about 1269.2546642409.

The spelling of 2044778660 in words is "two billion, forty-four million, seven hundred seventy-eight thousand, six hundred sixty".