22439878 has 4 divisors (see below), whose sum is σ = 33659820. Its totient is φ = 11219938.

The previous prime is 22439863. The next prime is 22439891. The reversal of 22439878 is 87893422.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5609968 + ... + 5609971.

It is an arithmetic number, because the mean of its divisors is an integer number (8414955).

Almost surely, 2^22439878 is an apocalyptic number.

22439878 is a deficient number, since it is larger than the sum of its proper divisors (11219942).

22439878 is a wasteful number, since it uses less digits than its factorization.

22439878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11219941.

The product of its digits is 193536, while the sum is 43.

The square root of 22439878 is about 4737.0748358032. The cubic root of 22439878 is about 282.0591311711.

It can be divided in two parts, 2243 and 9878, that added together give a palindrome (12121).

The spelling of 22439878 in words is "twenty-two million, four hundred thirty-nine thousand, eight hundred seventy-eight".