22728793 has 2 divisors, whose sum is σ = 22728794. Its totient is φ = 22728792.

The previous prime is 22728781. The next prime is 22728799. The reversal of 22728793 is 39782722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14961424 + 7767369 = 3868^2 + 2787^2 .

It is a cyclic number.

It is not a de Polignac number, because 22728793 - 2²¹ = 20631641 is a prime.

It is not a weakly prime, because it can be changed into another prime (22728799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11364396 + 11364397.

It is an arithmetic number, because the mean of its divisors is an integer number (11364397).

Almost surely, 2^22728793 is an apocalyptic number.

It is an amenable number.

22728793 is a deficient number, since it is larger than the sum of its proper divisors (1).

22728793 is an equidigital number, since it uses as much as digits as its factorization.

22728793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The square root of 22728793 is about 4767.4723911104. The cubic root of 22728793 is about 283.2644832323.

The spelling of 22728793 in words is "twenty-two million, seven hundred twenty-eight thousand, seven hundred ninety-three".