28831333 has 4 divisors (see below), whose sum is σ = 29761408. Its totient is φ = 27901260.

The previous prime is 28831321. The next prime is 28831349. The reversal of 28831333 is 33313882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28831333 - 2⁵ = 28831301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 930043 = 28831333 / (2 + 8 + 8 + 3 + 1 + 3 + 3 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28831295 and 28831304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28831393) 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 in 3 ways as a sum of consecutive naturals, for example, 464991 + ... + 465052.

It is an arithmetic number, because the mean of its divisors is an integer number (7440352).

Almost surely, 2^28831333 is an apocalyptic number.

It is an amenable number.

28831333 is a deficient number, since it is larger than the sum of its proper divisors (930075).

28831333 is an equidigital number, since it uses as much as digits as its factorization.

28831333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 930074.

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

The square root of 28831333 is about 5369.4816323366. The cubic root of 28831333 is about 306.6348936574.

The spelling of 28831333 in words is "twenty-eight million, eight hundred thirty-one thousand, three hundred thirty-three".