23238789 has 24 divisors (see below), whose sum is σ = 36388800. Its totient is φ = 13152384.

The previous prime is 23238769. The next prime is 23238793. The reversal of 23238789 is 98783232.

It is not a de Polignac number, because 23238789 - 2¹² = 23234693 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 23238789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23238739) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15912 + ... + 17310.

It is an arithmetic number, because the mean of its divisors is an integer number (1516200).

Almost surely, 2^23238789 is an apocalyptic number.

It is an amenable number.

23238789 is a deficient number, since it is larger than the sum of its proper divisors (13150011).

23238789 is a wasteful number, since it uses less digits than its factorization.

23238789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 1522 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 23238789 is about 4820.6627137770. The cubic root of 23238789 is about 285.3674914646.

The spelling of 23238789 in words is "twenty-three million, two hundred thirty-eight thousand, seven hundred eighty-nine".