28394299 has 4 divisors (see below), whose sum is σ = 28783336. Its totient is φ = 28005264.

The previous prime is 28394297. The next prime is 28394309. The reversal of 28394299 is 99249382.

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

It is a cyclic number.

It is not a de Polignac number, because 28394299 - 2¹ = 28394297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28394297) 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 in 3 ways as a sum of consecutive naturals, for example, 194409 + ... + 194554.

It is an arithmetic number, because the mean of its divisors is an integer number (7195834).

Almost surely, 2^28394299 is an apocalyptic number.

28394299 is a deficient number, since it is larger than the sum of its proper divisors (389037).

28394299 is an equidigital number, since it uses as much as digits as its factorization.

28394299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389036.

The product of its digits is 279936, while the sum is 46.

The square root of 28394299 is about 5328.6301241501. The cubic root of 28394299 is about 305.0776439430.

The spelling of 28394299 in words is "twenty-eight million, three hundred ninety-four thousand, two hundred ninety-nine".