23655389 has 4 divisors (see below), whose sum is σ = 23814300. Its totient is φ = 23496480.

The previous prime is 23655377. The next prime is 23655407. The reversal of 23655389 is 98355632.

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 2079364 + 21576025 = 1442^2 + 4645^2 .

It is a cyclic number.

It is not a de Polignac number, because 23655389 - 2²⁰ = 22606813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23655349) 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, 79232 + ... + 79529.

It is an arithmetic number, because the mean of its divisors is an integer number (5953575).

Almost surely, 2^23655389 is an apocalyptic number.

It is an amenable number.

23655389 is a deficient number, since it is larger than the sum of its proper divisors (158911).

23655389 is a wasteful number, since it uses less digits than its factorization.

23655389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158910.

The product of its digits is 194400, while the sum is 41.

The square root of 23655389 is about 4863.6806021777. The cubic root of 23655389 is about 287.0626555286.

The spelling of 23655389 in words is "twenty-three million, six hundred fifty-five thousand, three hundred eighty-nine".