28873193 has 2 divisors, whose sum is σ = 28873194. Its totient is φ = 28873192.

The previous prime is 28873189. The next prime is 28873213. The reversal of 28873193 is 39137882.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27164944 + 1708249 = 5212^2 + 1307^2 .

It is a cyclic number.

It is not a de Polignac number, because 28873193 - 2² = 28873189 is a prime.

It is a super-2 number, since 2×28873193² = 1667322548030498, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28873193.

It is not a weakly prime, because it can be changed into another prime (28803193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14436596 + 14436597.

It is an arithmetic number, because the mean of its divisors is an integer number (14436597).

Almost surely, 2^28873193 is an apocalyptic number.

It is an amenable number.

28873193 is a deficient number, since it is larger than the sum of its proper divisors (1).

28873193 is an equidigital number, since it uses as much as digits as its factorization.

28873193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 41.

The square root of 28873193 is about 5373.3781739237. The cubic root of 28873193 is about 306.7832222092.

The spelling of 28873193 in words is "twenty-eight million, eight hundred seventy-three thousand, one hundred ninety-three".