22811872 has 24 divisors (see below), whose sum is σ = 45217872. Its totient is φ = 11328000.

The previous prime is 22811849. The next prime is 22811879. The reversal of 22811872 is 27811822.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22811879) 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, 2472 + ... + 7192.

It is an arithmetic number, because the mean of its divisors is an integer number (1884078).

Almost surely, 2^22811872 is an apocalyptic number.

It is an amenable number.

22811872 is a deficient number, since it is larger than the sum of its proper divisors (22406000).

22811872 is a wasteful number, since it uses less digits than its factorization.

22811872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882 (or 4874 counting only the distinct ones).

The product of its digits is 3584, while the sum is 31.

The square root of 22811872 is about 4776.1775511386. The cubic root of 22811872 is about 283.6091959913.

It can be divided in two parts, 228 and 11872, that added together give a square (12100 = 110²).

The spelling of 22811872 in words is "twenty-two million, eight hundred eleven thousand, eight hundred seventy-two".