2808813389 has 16 divisors (see below), whose sum is σ = 3071520000. Its totient is φ = 2558206464.

The previous prime is 2808813347. The next prime is 2808813391. The reversal of 2808813389 is 9833188082.

It is a cyclic number.

It is not a de Polignac number, because 2808813389 - 2¹⁶ = 2808747853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2808813289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51362 + ... + 90860.

It is an arithmetic number, because the mean of its divisors is an integer number (191970000).

Almost surely, 2^2808813389 is an apocalyptic number.

It is an amenable number.

2808813389 is a deficient number, since it is larger than the sum of its proper divisors (262706611).

2808813389 is a wasteful number, since it uses less digits than its factorization.

2808813389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39652.

The product of its (nonzero) digits is 663552, while the sum is 50.

The square root of 2808813389 is about 52998.2394896283. The cubic root of 2808813389 is about 1410.9370209752.

The spelling of 2808813389 in words is "two billion, eight hundred eight million, eight hundred thirteen thousand, three hundred eighty-nine".