23724891 has 12 divisors (see below), whose sum is σ = 35759568. Its totient is φ = 15128784.

The previous prime is 23724887. The next prime is 23724893. The reversal of 23724891 is 19842732.

It is not a de Polignac number, because 23724891 - 2² = 23724887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23724893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57100 + ... + 57513.

It is an arithmetic number, because the mean of its divisors is an integer number (2979964).

Almost surely, 2^23724891 is an apocalyptic number.

23724891 is a deficient number, since it is larger than the sum of its proper divisors (12034677).

23724891 is a wasteful number, since it uses less digits than its factorization.

23724891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114642 (or 114639 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 23724891 is about 4870.8203621156. The cubic root of 23724891 is about 287.3435206446.

The spelling of 23724891 in words is "twenty-three million, seven hundred twenty-four thousand, eight hundred ninety-one".