23239989 has 12 divisors (see below), whose sum is σ = 34388172. Its totient is φ = 15115200.

The previous prime is 23239981. The next prime is 23240011. The reversal of 23239989 is 98993232.

It can be written as a sum of positive squares in 2 ways, for example, as 7700625 + 15539364 = 2775^2 + 3942^2 .

It is not a de Polignac number, because 23239989 - 2³ = 23239981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23239981) 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 11 ways as a sum of consecutive naturals, for example, 31122 + ... + 31859.

It is an arithmetic number, because the mean of its divisors is an integer number (2865681).

Almost surely, 2^23239989 is an apocalyptic number.

It is an amenable number.

23239989 is a deficient number, since it is larger than the sum of its proper divisors (11148183).

23239989 is a wasteful number, since it uses less digits than its factorization.

23239989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63028 (or 63025 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 23239989 is about 4820.7871763852. The cubic root of 23239989 is about 285.3724032968.

The spelling of 23239989 in words is "twenty-three million, two hundred thirty-nine thousand, nine hundred eighty-nine".