2789399980 has 24 divisors (see below), whose sum is σ = 6112425312. Its totient is φ = 1067248512.

The previous prime is 2789399947. The next prime is 2789399983. The reversal of 2789399980 is 899939872.

2789399980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2789399983) 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, 3031497 + ... + 3032416.

It is an arithmetic number, because the mean of its divisors is an integer number (254684388).

Almost surely, 2^2789399980 is an apocalyptic number.

2789399980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2789399980 is an abundant number, since it is smaller than the sum of its proper divisors (3323025332).

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

2789399980 is a wasteful number, since it uses less digits than its factorization.

2789399980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6063945 (or 6063943 counting only the distinct ones).

The product of its (nonzero) digits is 17635968, while the sum is 64.

The square root of 2789399980 is about 52814.7704719049. The cubic root of 2789399980 is about 1407.6788899217.

The spelling of 2789399980 in words is "two billion, seven hundred eighty-nine million, three hundred ninety-nine thousand, nine hundred eighty".