23028993 has 24 divisors (see below), whose sum is σ = 36090600. Its totient is φ = 14065920.

The previous prime is 23028979. The next prime is 23028997. The reversal of 23028993 is 39982032.

It can be written as a sum of positive squares in 4 ways, for example, as 1238769 + 21790224 = 1113^2 + 4668^2 .

It is not a de Polignac number, because 23028993 - 2⁵ = 23028961 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23028997) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16773 + ... + 18093.

It is an arithmetic number, because the mean of its divisors is an integer number (1503775).

Almost surely, 2^23028993 is an apocalyptic number.

It is an amenable number.

23028993 is a deficient number, since it is larger than the sum of its proper divisors (13061607).

23028993 is a wasteful number, since it uses less digits than its factorization.

23028993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489 (or 1486 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 23028993 is about 4798.8533005292. The cubic root of 23028993 is about 284.5061438027.

The spelling of 23028993 in words is "twenty-three million, twenty-eight thousand, nine hundred ninety-three".