22120389 has 24 divisors (see below), whose sum is σ = 33827040. Its totient is φ = 13890528.

The previous prime is 22120381. The next prime is 22120393. The reversal of 22120389 is 98302122.

It is a happy number.

It is not a de Polignac number, because 22120389 - 2³ = 22120381 is a prime.

It is a super-2 number, since 2×22120389² = 978623219022642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120381) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47134 + ... + 47600.

It is an arithmetic number, because the mean of its divisors is an integer number (1409460).

Almost surely, 2^22120389 is an apocalyptic number.

It is an amenable number.

22120389 is a deficient number, since it is larger than the sum of its proper divisors (11706651).

22120389 is a wasteful number, since it uses less digits than its factorization.

22120389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 769 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 22120389 is about 4703.2317612467. The cubic root of 22120389 is about 280.7141167819.

The spelling of 22120389 in words is "twenty-two million, one hundred twenty thousand, three hundred eighty-nine".