2809540042 has 16 divisors (see below), whose sum is σ = 4279968000. Its totient is φ = 1382986800.

The previous prime is 2809540007. The next prime is 2809540079. The reversal of 2809540042 is 2400459082.

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, 29667 + ... + 80617.

It is an arithmetic number, because the mean of its divisors is an integer number (267498000).

Almost surely, 2^2809540042 is an apocalyptic number.

2809540042 is a deficient number, since it is larger than the sum of its proper divisors (1470427958).

2809540042 is a wasteful number, since it uses less digits than its factorization.

2809540042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51381.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 2809540042 is about 53005.0944910015. The cubic root of 2809540042 is about 1411.0586824595.

The spelling of 2809540042 in words is "two billion, eight hundred nine million, five hundred forty thousand, forty-two".