22991044 has 12 divisors (see below), whose sum is σ = 40271868. Its totient is φ = 11484800.

The previous prime is 22991041. The next prime is 22991047. The reversal of 22991044 is 44019922.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22991041) and next prime (22991047).

It can be written as a sum of positive squares in 2 ways, for example, as 12180100 + 10810944 = 3490^2 + 3288^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22990997 and 22991015.

It is not an unprimeable number, because it can be changed into a prime (22991041) 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, 3984 + ... + 7864.

It is an arithmetic number, because the mean of its divisors is an integer number (3355989).

Almost surely, 2^22991044 is an apocalyptic number.

It is an amenable number.

22991044 is a deficient number, since it is larger than the sum of its proper divisors (17280824).

22991044 is a wasteful number, since it uses less digits than its factorization.

22991044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5366 (or 5364 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 22991044 is about 4794.8977048525. The cubic root of 22991044 is about 284.3497806239.

The spelling of 22991044 in words is "twenty-two million, nine hundred ninety-one thousand, forty-four".