28162793 has 4 divisors (see below), whose sum is σ = 28212180. Its totient is φ = 28113408.

The previous prime is 28162781. The next prime is 28162811. The reversal of 28162793 is 39726182.

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

It can be written as a sum of positive squares in 2 ways, for example, as 21418384 + 6744409 = 4628^2 + 2597^2 .

It is a cyclic number.

It is not a de Polignac number, because 28162793 - 2¹⁰ = 28161769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28162703) 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, 23828 + ... + 24981.

It is an arithmetic number, because the mean of its divisors is an integer number (7053045).

Almost surely, 2^28162793 is an apocalyptic number.

It is an amenable number.

28162793 is a deficient number, since it is larger than the sum of its proper divisors (49387).

28162793 is an equidigital number, since it uses as much as digits as its factorization.

28162793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49386.

The product of its digits is 36288, while the sum is 38.

The square root of 28162793 is about 5306.8628209141. The cubic root of 28162793 is about 304.2462549055.

The spelling of 28162793 in words is "twenty-eight million, one hundred sixty-two thousand, seven hundred ninety-three".