28833331 has 2 divisors, whose sum is σ = 28833332. Its totient is φ = 28833330.

The previous prime is 28833307. The next prime is 28833353. The reversal of 28833331 is 13333882.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28833331 - 2⁹ = 28832819 is a prime.

It is a super-2 number, since 2×28833331² = 1662721953111122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28833293 and 28833302.

It is not a weakly prime, because it can be changed into another prime (28833031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14416665 + 14416666.

It is an arithmetic number, because the mean of its divisors is an integer number (14416666).

Almost surely, 2^28833331 is an apocalyptic number.

28833331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28833331 is an equidigital number, since it uses as much as digits as its factorization.

28833331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 31.

The square root of 28833331 is about 5369.6676805925. The cubic root of 28833331 is about 306.6419767195.

The spelling of 28833331 in words is "twenty-eight million, eight hundred thirty-three thousand, three hundred thirty-one".