22128743 has 12 divisors (see below), whose sum is σ = 27722520. Its totient is φ = 17507952.

The previous prime is 22128739. The next prime is 22128767. The reversal of 22128743 is 34782122.

It is not a de Polignac number, because 22128743 - 2² = 22128739 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22128143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16733 + ... + 18006.

It is an arithmetic number, because the mean of its divisors is an integer number (2310210).

Almost surely, 2^22128743 is an apocalyptic number.

22128743 is a deficient number, since it is larger than the sum of its proper divisors (5593777).

22128743 is a wasteful number, since it uses less digits than its factorization.

22128743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34766 (or 34759 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 22128743 is about 4704.1197901414. The cubic root of 22128743 is about 280.7494505574.

The spelling of 22128743 in words is "twenty-two million, one hundred twenty-eight thousand, seven hundred forty-three".