22279238 has 4 divisors (see below), whose sum is σ = 33418860. Its totient is φ = 11139618.

The previous prime is 22279199. The next prime is 22279247. The reversal of 22279238 is 83297222.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 22279198 and 22279207.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5569808 + ... + 5569811.

It is an arithmetic number, because the mean of its divisors is an integer number (8354715).

Almost surely, 2^22279238 is an apocalyptic number.

22279238 is a deficient number, since it is larger than the sum of its proper divisors (11139622).

22279238 is a wasteful number, since it uses less digits than its factorization.

22279238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11139621.

The product of its digits is 24192, while the sum is 35.

The square root of 22279238 is about 4720.0887703517. The cubic root of 22279238 is about 281.3844612697.

The spelling of 22279238 in words is "twenty-two million, two hundred seventy-nine thousand, two hundred thirty-eight".