23328139 has 4 divisors (see below), whose sum is σ = 23897160. Its totient is φ = 22759120.

The previous prime is 23328113. The next prime is 23328197. The reversal of 23328139 is 93182332.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23328139 - 2¹⁷ = 23197067 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23328139.

It is not an unprimeable number, because it can be changed into a prime (23328439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284449 + ... + 284530.

It is an arithmetic number, because the mean of its divisors is an integer number (5974290).

Almost surely, 2^23328139 is an apocalyptic number.

23328139 is a deficient number, since it is larger than the sum of its proper divisors (569021).

23328139 is an equidigital number, since it uses as much as digits as its factorization.

23328139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569020.

The product of its digits is 7776, while the sum is 31.

The square root of 23328139 is about 4829.9212208896. The cubic root of 23328139 is about 285.7327568654.

The spelling of 23328139 in words is "twenty-three million, three hundred twenty-eight thousand, one hundred thirty-nine".