22123790 has 64 divisors (see below), whose sum is σ = 46267200. Its totient is φ = 7592832.

The previous prime is 22123757. The next prime is 22123799. The reversal of 22123790 is 9732122.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22123799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 417404 + ... + 417456.

It is an arithmetic number, because the mean of its divisors is an integer number (722925).

Almost surely, 2^22123790 is an apocalyptic number.

22123790 is an abundant number, since it is smaller than the sum of its proper divisors (24143410).

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

22123790 is a wasteful number, since it uses less digits than its factorization.

22123790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 22123790 is about 4703.5933072493. The cubic root of 22123790 is about 280.7285026016.

The spelling of 22123790 in words is "twenty-two million, one hundred twenty-three thousand, seven hundred ninety".