23157789 has 12 divisors (see below), whose sum is σ = 32589216. Its totient is φ = 14625288.

The previous prime is 23157773. The next prime is 23157809. The reversal of 23157789 is 98775132.

It is not a de Polignac number, because 23157789 - 2⁴ = 23157773 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23157789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23157749) 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, 9609 + ... + 11774.

It is an arithmetic number, because the mean of its divisors is an integer number (2715768).

Almost surely, 2^23157789 is an apocalyptic number.

It is an amenable number.

23157789 is a deficient number, since it is larger than the sum of its proper divisors (9431427).

23157789 is a wasteful number, since it uses less digits than its factorization.

23157789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21424 (or 21405 counting only the distinct ones).

The product of its digits is 105840, while the sum is 42.

The square root of 23157789 is about 4812.2540456630. The cubic root of 23157789 is about 285.0355511207.

The spelling of 23157789 in words is "twenty-three million, one hundred fifty-seven thousand, seven hundred eighty-nine".