28322159 has 4 divisors (see below), whose sum is σ = 28356216. Its totient is φ = 28288104.

The previous prime is 28322111. The next prime is 28322191. The reversal of 28322159 is 95122382.

It is a happy number.

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 28322159 - 2⁸ = 28321903 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 (28321159) 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, 15749 + ... + 17454.

It is an arithmetic number, because the mean of its divisors is an integer number (7089054).

Almost surely, 2^28322159 is an apocalyptic number.

28322159 is a deficient number, since it is larger than the sum of its proper divisors (34057).

28322159 is an equidigital number, since it uses as much as digits as its factorization.

28322159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34056.

The product of its digits is 8640, while the sum is 32.

The square root of 28322159 is about 5321.8567248659. The cubic root of 28322159 is about 304.8190595694.

The spelling of 28322159 in words is "twenty-eight million, three hundred twenty-two thousand, one hundred fifty-nine".