2291908 has 24 divisors (see below), whose sum is σ = 4177152. Its totient is φ = 1099584.

The previous prime is 2291903. The next prime is 2291909. The reversal of 2291908 is 8091922.

It is a self number, because there is not a number n which added to its sum of digits gives 2291908.

It is not an unprimeable number, because it can be changed into a prime (2291903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13641 + ... + 13807.

It is an arithmetic number, because the mean of its divisors is an integer number (174048).

2^2291908 is an apocalyptic number.

It is an amenable number.

2291908 is a deficient number, since it is larger than the sum of its proper divisors (1885244).

2291908 is a wasteful number, since it uses less digits than its factorization.

2291908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 2291908 is about 1513.9048847269. The cubic root of 2291908 is about 131.8456260805.

The spelling of 2291908 in words is "two million, two hundred ninety-one thousand, nine hundred eight".