23727985 has 4 divisors (see below), whose sum is σ = 28473588. Its totient is φ = 18982384.

The previous prime is 23727953. The next prime is 23728009. The reversal of 23727985 is 58972732.

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

It can be written as a sum of positive squares in 2 ways, for example, as 17715681 + 6012304 = 4209^2 + 2452^2 .

It is a cyclic number.

It is not a de Polignac number, because 23727985 - 2⁵ = 23727953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2372794 + ... + 2372803.

It is an arithmetic number, because the mean of its divisors is an integer number (7118397).

Almost surely, 2^23727985 is an apocalyptic number.

It is an amenable number.

23727985 is a deficient number, since it is larger than the sum of its proper divisors (4745603).

23727985 is an equidigital number, since it uses as much as digits as its factorization.

23727985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4745602.

The product of its digits is 211680, while the sum is 43.

The square root of 23727985 is about 4871.1379573976. The cubic root of 23727985 is about 287.3560110737.

The spelling of 23727985 in words is "twenty-three million, seven hundred twenty-seven thousand, nine hundred eighty-five".