22490138 has 16 divisors (see below), whose sum is σ = 38072160. Its totient is φ = 9870000.

The previous prime is 22490137. The next prime is 22490177. The reversal of 22490138 is 83109422.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a self number, because there is not a number n which added to its sum of digits gives 22490138.

It is not an unprimeable number, because it can be changed into a prime (22490137) 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, 16988 + ... + 18263.

It is an arithmetic number, because the mean of its divisors is an integer number (2379510).

Almost surely, 2^22490138 is an apocalyptic number.

22490138 is a deficient number, since it is larger than the sum of its proper divisors (15582022).

22490138 is a wasteful number, since it uses less digits than its factorization.

22490138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35293.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 22490138 is about 4742.3768302403. The cubic root of 22490138 is about 282.2695559818.

The spelling of 22490138 in words is "twenty-two million, four hundred ninety thousand, one hundred thirty-eight".