22972978 has 8 divisors (see below), whose sum is σ = 39382272. Its totient is φ = 9845556.

The previous prime is 22972951. The next prime is 22972987. The reversal of 22972978 is 87927922.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820450 + ... + 820477.

It is an arithmetic number, because the mean of its divisors is an integer number (4922784).

Almost surely, 2^22972978 is an apocalyptic number.

22972978 is a deficient number, since it is larger than the sum of its proper divisors (16409294).

22972978 is a wasteful number, since it uses less digits than its factorization.

22972978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640936.

The product of its digits is 254016, while the sum is 46.

The square root of 22972978 is about 4793.0134571061. The cubic root of 22972978 is about 284.2752819152.

The spelling of 22972978 in words is "twenty-two million, nine hundred seventy-two thousand, nine hundred seventy-eight".