22431128 has 8 divisors (see below), whose sum is σ = 42058380. Its totient is φ = 11215560.

The previous prime is 22431127. The next prime is 22431133. The reversal of 22431128 is 82113422.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22431127) by changing a digit.

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, 1401938 + ... + 1401953.

Almost surely, 2^22431128 is an apocalyptic number.

It is an amenable number.

22431128 is a deficient number, since it is larger than the sum of its proper divisors (19627252).

22431128 is a wasteful number, since it uses less digits than its factorization.

22431128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803897 (or 2803893 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 22431128 is about 4736.1511800195. The cubic root of 22431128 is about 282.0224652223.

The spelling of 22431128 in words is "twenty-two million, four hundred thirty-one thousand, one hundred twenty-eight".