23728993 has 4 divisors (see below), whose sum is σ = 24029440. Its totient is φ = 23428548.

The previous prime is 23728987. The next prime is 23728997. The reversal of 23728993 is 39982732.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23728993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23728997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150105 + ... + 150262.

It is an arithmetic number, because the mean of its divisors is an integer number (6007360).

Almost surely, 2^23728993 is an apocalyptic number.

It is an amenable number.

23728993 is a deficient number, since it is larger than the sum of its proper divisors (300447).

23728993 is an equidigital number, since it uses as much as digits as its factorization.

23728993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300446.

The product of its digits is 163296, while the sum is 43.

The square root of 23728993 is about 4871.2414228819. The cubic root of 23728993 is about 287.3600801193.

The spelling of 23728993 in words is "twenty-three million, seven hundred twenty-eight thousand, nine hundred ninety-three".