2291812 has 24 divisors (see below), whose sum is σ = 4334400. Its totient is φ = 1057056.

The previous prime is 2291803. The next prime is 2291827. The reversal of 2291812 is 2181922.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2239 + ... + 3097.

It is an arithmetic number, because the mean of its divisors is an integer number (180600).

2^2291812 is an apocalyptic number.

It is an amenable number.

2291812 is a deficient number, since it is larger than the sum of its proper divisors (2042588).

2291812 is a wasteful number, since it uses less digits than its factorization.

2291812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 915 (or 913 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

The square root of 2291812 is about 1513.8731783079. The cubic root of 2291812 is about 131.8437852043.

The spelling of 2291812 in words is "two million, two hundred ninety-one thousand, eight hundred twelve".