2809268380 has 24 divisors (see below), whose sum is σ = 5996178720. Its totient is φ = 1105285440.

The previous prime is 2809268359. The next prime is 2809268383. The reversal of 2809268380 is 838629082.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2809268380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2809268383) 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, 1150120 + ... + 1152559.

It is an arithmetic number, because the mean of its divisors is an integer number (249840780).

Almost surely, 2^2809268380 is an apocalyptic number.

2809268380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2809268380 is an abundant number, since it is smaller than the sum of its proper divisors (3186910340).

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

2809268380 is a wasteful number, since it uses less digits than its factorization.

2809268380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302749 (or 2302747 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 2809268380 is about 53002.5318263194. The cubic root of 2809268380 is about 1411.0132013044.

The spelling of 2809268380 in words is "two billion, eight hundred nine million, two hundred sixty-eight thousand, three hundred eighty".