23939855 has 4 divisors (see below), whose sum is σ = 28727832. Its totient is φ = 19151880.

The previous prime is 23939827. The next prime is 23939879. The reversal of 23939855 is 55893932.

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

It is a de Polignac number, because none of the positive numbers 2^k-23939855 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2393981 + ... + 2393990.

It is an arithmetic number, because the mean of its divisors is an integer number (7181958).

Almost surely, 2^23939855 is an apocalyptic number.

23939855 is a deficient number, since it is larger than the sum of its proper divisors (4787977).

23939855 is an equidigital number, since it uses as much as digits as its factorization.

23939855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4787976.

The product of its digits is 291600, while the sum is 44.

The square root of 23939855 is about 4892.8371115336. The cubic root of 23939855 is about 288.2087566645.

The spelling of 23939855 in words is "twenty-three million, nine hundred thirty-nine thousand, eight hundred fifty-five".