2904239891 has 8 divisors (see below), whose sum is σ = 3320824320. Its totient is φ = 2488078728.

The previous prime is 2904239873. The next prime is 2904239893. The reversal of 2904239891 is 1989324092.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2904239891 - 2⁶ = 2904239827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2904239893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90971 + ... + 118676.

It is an arithmetic number, because the mean of its divisors is an integer number (415103040).

Almost surely, 2^2904239891 is an apocalyptic number.

2904239891 is a deficient number, since it is larger than the sum of its proper divisors (416584429).

2904239891 is a wasteful number, since it uses less digits than its factorization.

2904239891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211633.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 2904239891 is about 53891.0000927799. Note that the first 4 decimals coincide. The cubic root of 2904239891 is about 1426.7377820028.

The spelling of 2904239891 in words is "two billion, nine hundred four million, two hundred thirty-nine thousand, eight hundred ninety-one".