22664978 has 16 divisors (see below), whose sum is σ = 41140224. Its totient is φ = 9142080.

The previous prime is 22664963. The next prime is 22664981. The reversal of 22664978 is 87946622.

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 in 7 ways as a sum of consecutive naturals, for example, 47378 + ... + 47853.

It is an arithmetic number, because the mean of its divisors is an integer number (2571264).

Almost surely, 2^22664978 is an apocalyptic number.

22664978 is a deficient number, since it is larger than the sum of its proper divisors (18475246).

22664978 is a wasteful number, since it uses less digits than its factorization.

22664978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95257.

The product of its digits is 290304, while the sum is 44.

The square root of 22664978 is about 4760.7749369194. The cubic root of 22664978 is about 282.9991301317. Note that the first 3 decimals are identical.

The spelling of 22664978 in words is "twenty-two million, six hundred sixty-four thousand, nine hundred seventy-eight".