22857789 has 4 divisors (see below), whose sum is σ = 30477056. Its totient is φ = 15238524.

The previous prime is 22857767. The next prime is 22857803. The reversal of 22857789 is 98775822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22857789 - 2¹⁹ = 22333501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22857719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3809629 + ... + 3809634.

It is an arithmetic number, because the mean of its divisors is an integer number (7619264).

Almost surely, 2^22857789 is an apocalyptic number.

It is an amenable number.

22857789 is a deficient number, since it is larger than the sum of its proper divisors (7619267).

22857789 is an equidigital number, since it uses as much as digits as its factorization.

22857789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7619266.

The product of its digits is 564480, while the sum is 48.

The square root of 22857789 is about 4780.9820120975. The cubic root of 22857789 is about 283.7993565614.

The spelling of 22857789 in words is "twenty-two million, eight hundred fifty-seven thousand, seven hundred eighty-nine".