22406589 has 18 divisors (see below), whose sum is σ = 33595770. Its totient is φ = 14373408.

The previous prime is 22406543. The next prime is 22406627. The reversal of 22406589 is 98560422.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 14953689 + 7452900 = 3867^2 + 2730^2 .

It is not a de Polignac number, because 22406589 - 2⁹ = 22406077 is a prime.

It is a super-2 number, since 2×22406589² = 1004110461229842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22406509) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 76327 + ... + 76619.

Almost surely, 2^22406589 is an apocalyptic number.

22406589 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

22406589 is a deficient number, since it is larger than the sum of its proper divisors (11189181).

22406589 is an equidigital number, since it uses as much as digits as its factorization.

22406589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 325 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 22406589 is about 4733.5598654712. The cubic root of 22406589 is about 281.9195862464.

The spelling of 22406589 in words is "twenty-two million, four hundred six thousand, five hundred eighty-nine".