22978972 has 12 divisors (see below), whose sum is σ = 40521096. Its totient is φ = 11401520.

The previous prime is 22978957. The next prime is 22978973. The reversal of 22978972 is 27987922.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22978973) 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 3 ways as a sum of consecutive naturals, for example, 21403 + ... + 22450.

It is an arithmetic number, because the mean of its divisors is an integer number (3376758).

Almost surely, 2^22978972 is an apocalyptic number.

It is an amenable number.

22978972 is a deficient number, since it is larger than the sum of its proper divisors (17542124).

22978972 is a wasteful number, since it uses less digits than its factorization.

22978972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43988 (or 43986 counting only the distinct ones).

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

The square root of 22978972 is about 4793.6387014459. The cubic root of 22978972 is about 284.3000036828.

The spelling of 22978972 in words is "twenty-two million, nine hundred seventy-eight thousand, nine hundred seventy-two".