2809825988 has 24 divisors (see below), whose sum is σ = 5080018944. Its totient is φ = 1358467200.

The previous prime is 2809825961. The next prime is 2809826009. The reversal of 2809825988 is 8895289082.

2809825988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2809825988² = 15790244165680352288, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152093 + ... + 169563.

It is an arithmetic number, because the mean of its divisors is an integer number (211667456).

Almost surely, 2^2809825988 is an apocalyptic number.

It is an amenable number.

2809825988 is a deficient number, since it is larger than the sum of its proper divisors (2270192956).

2809825988 is a wasteful number, since it uses less digits than its factorization.

2809825988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18803 (or 18801 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 59.

The square root of 2809825988 is about 53007.7917668714. The cubic root of 2809825988 is about 1411.1065518488.

The spelling of 2809825988 in words is "two billion, eight hundred nine million, eight hundred twenty-five thousand, nine hundred eighty-eight".