28290033 has 8 divisors (see below), whose sum is σ = 41911200. Its totient is φ = 18860004.

The previous prime is 28290019. The next prime is 28290037. The reversal of 28290033 is 33009282.

It is not a de Polignac number, because 28290033 - 2⁸ = 28289777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1047779 = 28290033 / (2 + 8 + 2 + 9 + 0 + 0 + 3 + 3).

It is a junction number, because it is equal to n+sod(n) for n = 28289979 and 28290006.

It is not an unprimeable number, because it can be changed into a prime (28290037) 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 7 ways as a sum of consecutive naturals, for example, 523863 + ... + 523916.

It is an arithmetic number, because the mean of its divisors is an integer number (5238900).

Almost surely, 2^28290033 is an apocalyptic number.

It is an amenable number.

28290033 is a deficient number, since it is larger than the sum of its proper divisors (13621167).

28290033 is a wasteful number, since it uses less digits than its factorization.

28290033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047788 (or 1047782 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 28290033 is about 5318.8375609714. The cubic root of 28290033 is about 304.7037632502.

The spelling of 28290033 in words is "twenty-eight million, two hundred ninety thousand, thirty-three".