28119331 has 2 divisors, whose sum is σ = 28119332. Its totient is φ = 28119330.

The previous prime is 28119319. The next prime is 28119347. The reversal of 28119331 is 13391182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28119331 - 2⁹ = 28118819 is a prime.

It is a super-2 number, since 2×28119331² = 1581393551775122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28119331.

It is not a weakly prime, because it can be changed into another prime (28119391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14059665 + 14059666.

It is an arithmetic number, because the mean of its divisors is an integer number (14059666).

Almost surely, 2^28119331 is an apocalyptic number.

28119331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28119331 is an equidigital number, since it uses as much as digits as its factorization.

28119331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 28119331 is about 5302.7663535178. The cubic root of 28119331 is about 304.0896658113.

The spelling of 28119331 in words is "twenty-eight million, one hundred nineteen thousand, three hundred thirty-one".