22390239 has 4 divisors (see below), whose sum is σ = 29853656. Its totient is φ = 14926824.

The previous prime is 22390213. The next prime is 22390253. The reversal of 22390239 is 93209322.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 22390239 - 2⁹ = 22389727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22390279) 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, 3731704 + ... + 3731709.

It is an arithmetic number, because the mean of its divisors is an integer number (7463414).

Almost surely, 2^22390239 is an apocalyptic number.

22390239 is a deficient number, since it is larger than the sum of its proper divisors (7463417).

22390239 is an equidigital number, since it uses as much as digits as its factorization.

22390239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7463416.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 22390239 is about 4731.8325202822. The cubic root of 22390239 is about 281.8509976891.

The spelling of 22390239 in words is "twenty-two million, three hundred ninety thousand, two hundred thirty-nine".