28399373 has 2 divisors, whose sum is σ = 28399374. Its totient is φ = 28399372.

The previous prime is 28399331. The next prime is 28399391. The reversal of 28399373 is 37399382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27899524 + 499849 = 5282^2 + 707^2 .

It is a cyclic number.

It is not a de Polignac number, because 28399373 - 2⁶ = 28399309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28399303) 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, 14199686 + 14199687.

It is an arithmetic number, because the mean of its divisors is an integer number (14199687).

Almost surely, 2^28399373 is an apocalyptic number.

It is an amenable number.

28399373 is a deficient number, since it is larger than the sum of its proper divisors (1).

28399373 is an equidigital number, since it uses as much as digits as its factorization.

28399373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 44.

The square root of 28399373 is about 5329.1062102383. The cubic root of 28399373 is about 305.0958150996.

Subtracting 28399373 from its reverse (37399382), we obtain a palindrome (9000009).

The spelling of 28399373 in words is "twenty-eight million, three hundred ninety-nine thousand, three hundred seventy-three".