28007093 has 4 divisors (see below), whose sum is σ = 28075980. Its totient is φ = 27938208.

The previous prime is 28007087. The next prime is 28007099. The reversal of 28007093 is 39070082.

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

It is an interprime number because it is at equal distance from previous prime (28007087) and next prime (28007099).

It can be written as a sum of positive squares in 2 ways, for example, as 23020804 + 4986289 = 4798^2 + 2233^2 .

It is a cyclic number.

It is not a de Polignac number, because 28007093 - 2²⁰ = 26958517 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 (28007099) 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, 33830 + ... + 34647.

It is an arithmetic number, because the mean of its divisors is an integer number (7018995).

Almost surely, 2^28007093 is an apocalyptic number.

It is an amenable number.

28007093 is a deficient number, since it is larger than the sum of its proper divisors (68887).

28007093 is an equidigital number, since it uses as much as digits as its factorization.

28007093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68886.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 28007093 is about 5292.1728051907. The cubic root of 28007093 is about 303.6845361246.

The spelling of 28007093 in words is "twenty-eight million, seven thousand, ninety-three".