2231908 has 24 divisors (see below), whose sum is σ = 4524800. Its totient is φ = 943488.

The previous prime is 2231891. The next prime is 2231909. The reversal of 2231908 is 8091322.

It is a super-3 number, since 3×2231908³ = 33354168723750495936, which contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2231909) 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, 1708 + ... + 2716.

2^2231908 is an apocalyptic number.

2231908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2231908 is an abundant number, since it is smaller than the sum of its proper divisors (2292892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2231908 is a wasteful number, since it uses less digits than its factorization.

2231908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2231908 is about 1493.9571613671. The cubic root of 2231908 is about 130.6849059411.

The spelling of 2231908 in words is "two million, two hundred thirty-one thousand, nine hundred eight".