23528399 has 4 divisors (see below), whose sum is σ = 23640120. Its totient is φ = 23416680.

The previous prime is 23528389. The next prime is 23528419. The reversal of 23528399 is 99382532.

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 23528399 - 2¹⁶ = 23462863 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 (23528339) 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, 55544 + ... + 55965.

It is an arithmetic number, because the mean of its divisors is an integer number (5910030).

Almost surely, 2^23528399 is an apocalyptic number.

23528399 is a deficient number, since it is larger than the sum of its proper divisors (111721).

23528399 is a wasteful number, since it uses less digits than its factorization.

23528399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111720.

The product of its digits is 116640, while the sum is 41.

The square root of 23528399 is about 4850.6081062069. The cubic root of 23528399 is about 286.5480509505.

The spelling of 23528399 in words is "twenty-three million, five hundred twenty-eight thousand, three hundred ninety-nine".