22429978 has 16 divisors (see below), whose sum is σ = 34145280. Its totient is φ = 11049696.

The previous prime is 22429949. The next prime is 22429999. The reversal of 22429978 is 87992422.

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, 58993 + ... + 59371.

It is an arithmetic number, because the mean of its divisors is an integer number (2134080).

Almost surely, 2^22429978 is an apocalyptic number.

22429978 is a deficient number, since it is larger than the sum of its proper divisors (11715302).

22429978 is a wasteful number, since it uses less digits than its factorization.

22429978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 741.

The product of its digits is 145152, while the sum is 43.

The square root of 22429978 is about 4736.0297718659. The cubic root of 22429978 is about 282.0176455602.

The spelling of 22429978 in words is "twenty-two million, four hundred twenty-nine thousand, nine hundred seventy-eight".