22508978 has 4 divisors (see below), whose sum is σ = 33763470. Its totient is φ = 11254488.

The previous prime is 22508953. The next prime is 22509013. The reversal of 22508978 is 87980522.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 19829209 + 2679769 = 4453^2 + 1637^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5627243 + ... + 5627246.

Almost surely, 2^22508978 is an apocalyptic number.

22508978 is a deficient number, since it is larger than the sum of its proper divisors (11254492).

22508978 is a wasteful number, since it uses less digits than its factorization.

22508978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11254491.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 22508978 is about 4744.3627601607. The cubic root of 22508978 is about 282.3483530998.

The spelling of 22508978 in words is "twenty-two million, five hundred eight thousand, nine hundred seventy-eight".