2808389772 has 96 divisors (see below), whose sum is σ = 7677331200. Its totient is φ = 885344256.

The previous prime is 2808389767. The next prime is 2808389803. The reversal of 2808389772 is 2779838082.

It is a super-2 number, since 2×2808389772² = 15774106222948423968, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2365363 + ... + 2366549.

It is an arithmetic number, because the mean of its divisors is an integer number (79972200).

Almost surely, 2^2808389772 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2808389772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3838665600).

2808389772 is an abundant number, since it is smaller than the sum of its proper divisors (4868941428).

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

2808389772 is a wasteful number, since it uses less digits than its factorization.

2808389772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372 (or 2364 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The square root of 2808389772 is about 52994.2428193856. The cubic root of 2808389772 is about 1410.8660862808.

It can be divided in two parts, 28083 and 89772, that added together give a triangular number (117855 = T₄₈₅).

The spelling of 2808389772 in words is "two billion, eight hundred eight million, three hundred eighty-nine thousand, seven hundred seventy-two".