28020833 has 4 divisors (see below), whose sum is σ = 28035120. Its totient is φ = 28006548.

The previous prime is 28020827. The next prime is 28020847. The reversal of 28020833 is 33802082.

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 28020833 - 2²² = 23826529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28020823) 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 in 3 ways as a sum of consecutive naturals, for example, 3623 + ... + 8316.

It is an arithmetic number, because the mean of its divisors is an integer number (7008780).

Almost surely, 2^28020833 is an apocalyptic number.

It is an amenable number.

28020833 is a deficient number, since it is larger than the sum of its proper divisors (14287).

28020833 is a wasteful number, since it uses less digits than its factorization.

28020833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14286.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 28020833 is about 5293.4707895671. The cubic root of 28020833 is about 303.7341895387.

The spelling of 28020833 in words is "twenty-eight million, twenty thousand, eight hundred thirty-three".