23039865 has 12 divisors (see below), whose sum is σ = 39935844. Its totient is φ = 12287904.

The previous prime is 23039843. The next prime is 23039881. The reversal of 23039865 is 56893032.

It can be written as a sum of positive squares in 2 ways, for example, as 9884736 + 13155129 = 3144^2 + 3627^2 .

It is not a de Polignac number, because 23039865 - 2¹² = 23035769 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255954 + ... + 256043.

It is an arithmetic number, because the mean of its divisors is an integer number (3327987).

Almost surely, 2^23039865 is an apocalyptic number.

It is an amenable number.

23039865 is a deficient number, since it is larger than the sum of its proper divisors (16895979).

23039865 is a wasteful number, since it uses less digits than its factorization.

23039865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512008 (or 512005 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 23039865 is about 4799.9859374794. The cubic root of 23039865 is about 284.5509085935.

The spelling of 23039865 in words is "twenty-three million, thirty-nine thousand, eight hundred sixty-five".