22128452 has 6 divisors (see below), whose sum is σ = 38724798. Its totient is φ = 11064224.

The previous prime is 22128443. The next prime is 22128473. The reversal of 22128452 is 25482122.

It can be written as a sum of positive squares in only one way, i.e., 19149376 + 2979076 = 4376^2 + 1726^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2766053 + ... + 2766060.

It is an arithmetic number, because the mean of its divisors is an integer number (6454133).

Almost surely, 2^22128452 is an apocalyptic number.

It is an amenable number.

22128452 is a deficient number, since it is larger than the sum of its proper divisors (16596346).

22128452 is a wasteful number, since it uses less digits than its factorization.

22128452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5532117 (or 5532115 counting only the distinct ones).

The product of its digits is 2560, while the sum is 26.

The square root of 22128452 is about 4704.0888597049. The cubic root of 22128452 is about 280.7482199038.

The spelling of 22128452 in words is "twenty-two million, one hundred twenty-eight thousand, four hundred fifty-two".