22428972 has 36 divisors (see below), whose sum is σ = 58017960. Its totient is φ = 7301952.

The previous prime is 22428961. The next prime is 22428983. The reversal of 22428972 is 27982422.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (22428961) and next prime (22428983).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 5697 + ... + 8792.

It is an arithmetic number, because the mean of its divisors is an integer number (1611610).

Almost surely, 2^22428972 is an apocalyptic number.

It is an amenable number.

22428972 is an abundant number, since it is smaller than the sum of its proper divisors (35588988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22428972 is a wasteful number, since it uses less digits than its factorization.

22428972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14542 (or 14537 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 22428972 is about 4735.9235635724. The cubic root of 22428972 is about 282.0134292684.

The spelling of 22428972 in words is "twenty-two million, four hundred twenty-eight thousand, nine hundred seventy-two".