2809469538 has 48 divisors (see below), whose sum is σ = 6464072160. Its totient is φ = 878828928.

The previous prime is 2809469513. The next prime is 2809469591. The reversal of 2809469538 is 8359649082.

2809469538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 92953 + ... + 119411.

It is an arithmetic number, because the mean of its divisors is an integer number (134668170).

Almost surely, 2^2809469538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2809469538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3232036080).

2809469538 is an abundant number, since it is smaller than the sum of its proper divisors (3654602622).

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

2809469538 is a wasteful number, since it uses less digits than its factorization.

2809469538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26831 (or 26828 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The square root of 2809469538 is about 53004.4294186816. The cubic root of 2809469538 is about 1411.0468790905.

The spelling of 2809469538 in words is "two billion, eight hundred nine million, four hundred sixty-nine thousand, five hundred thirty-eight".