22128839 has 2 divisors, whose sum is σ = 22128840. Its totient is φ = 22128838.

The previous prime is 22128811. The next prime is 22128851. The reversal of 22128839 is 93882122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22128839 - 2¹² = 22124743 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22128799 and 22128808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22128809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11064419 + 11064420.

It is an arithmetic number, because the mean of its divisors is an integer number (11064420).

Almost surely, 2^22128839 is an apocalyptic number.

22128839 is a deficient number, since it is larger than the sum of its proper divisors (1).

22128839 is an equidigital number, since it uses as much as digits as its factorization.

22128839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 35.

The square root of 22128839 is about 4704.1299939521. The cubic root of 22128839 is about 280.7498565438.

The spelling of 22128839 in words is "twenty-two million, one hundred twenty-eight thousand, eight hundred thirty-nine".