2809118242 has 16 divisors (see below), whose sum is σ = 4842538560. Its totient is φ = 1197181008.

The previous prime is 2809118203. The next prime is 2809118297. The reversal of 2809118242 is 2428119082.

It is a happy number.

It is a super-2 number, since 2×2809118242² = 15782290595074341128, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 557973 + ... + 562984.

It is an arithmetic number, because the mean of its divisors is an integer number (302658660).

Almost surely, 2^2809118242 is an apocalyptic number.

2809118242 is a deficient number, since it is larger than the sum of its proper divisors (2033420318).

2809118242 is a wasteful number, since it uses less digits than its factorization.

2809118242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1121145.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 2809118242 is about 53001.1154788274. The cubic root of 2809118242 is about 1410.9880642170.

The spelling of 2809118242 in words is "two billion, eight hundred nine million, one hundred eighteen thousand, two hundred forty-two".