22439378 has 16 divisors (see below), whose sum is σ = 37093056. Its totient is φ = 10115280.

The previous prime is 22439377. The next prime is 22439401. The reversal of 22439378 is 87393422.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (22439377) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 8918 + ... + 11153.

It is an arithmetic number, because the mean of its divisors is an integer number (2318316).

Almost surely, 2^22439378 is an apocalyptic number.

22439378 is a deficient number, since it is larger than the sum of its proper divisors (14653678).

22439378 is a wasteful number, since it uses less digits than its factorization.

22439378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20129.

The product of its digits is 72576, while the sum is 38.

The square root of 22439378 is about 4737.0220603244. The cubic root of 22439378 is about 282.0570362308.

The spelling of 22439378 in words is "twenty-two million, four hundred thirty-nine thousand, three hundred seventy-eight".