2268904891 has 4 divisors (see below), whose sum is σ = 2475168984. Its totient is φ = 2062640800.

The previous prime is 2268904889. The next prime is 2268904961. The reversal of 2268904891 is 1984098622.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2268904891 - 2¹ = 2268904889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2268904691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103132030 + ... + 103132051.

It is an arithmetic number, because the mean of its divisors is an integer number (618792246).

Almost surely, 2^2268904891 is an apocalyptic number.

2268904891 is a deficient number, since it is larger than the sum of its proper divisors (206264093).

2268904891 is a wasteful number, since it uses less digits than its factorization.

2268904891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206264092.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 2268904891 is about 47633.0231142219. The cubic root of 2268904891 is about 1314.0304536294.

The spelling of 2268904891 in words is "two billion, two hundred sixty-eight million, nine hundred four thousand, eight hundred ninety-one".