23188985 has 8 divisors (see below), whose sum is σ = 28505736. Its totient is φ = 18098560.

The previous prime is 23188981. The next prime is 23188993. The reversal of 23188985 is 58988132.

It can be written as a sum of positive squares in 4 ways, for example, as 43264 + 23145721 = 208^2 + 4811^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 23188985 - 2² = 23188981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23188981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56354 + ... + 56763.

It is an arithmetic number, because the mean of its divisors is an integer number (3563217).

Almost surely, 2^23188985 is an apocalyptic number.

It is an amenable number.

23188985 is a deficient number, since it is larger than the sum of its proper divisors (5316751).

23188985 is a wasteful number, since it uses less digits than its factorization.

23188985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113163.

The product of its digits is 138240, while the sum is 44.

The square root of 23188985 is about 4815.4942633130. The cubic root of 23188985 is about 285.1634847392.

The spelling of 23188985 in words is "twenty-three million, one hundred eighty-eight thousand, nine hundred eighty-five".