22540978 has 16 divisors (see below), whose sum is σ = 34418880. Its totient is φ = 11070000.

The previous prime is 22540951. The next prime is 22540981. The reversal of 22540978 is 87904522.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30133 + ... + 30871.

It is an arithmetic number, because the mean of its divisors is an integer number (2151180).

Almost surely, 2^22540978 is an apocalyptic number.

22540978 is a deficient number, since it is larger than the sum of its proper divisors (11877902).

22540978 is a wasteful number, since it uses less digits than its factorization.

22540978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 22540978 is about 4747.7339858084. The cubic root of 22540978 is about 282.4820903884.

The spelling of 22540978 in words is "twenty-two million, five hundred forty thousand, nine hundred seventy-eight".