28749033 has 16 divisors (see below), whose sum is σ = 44833600. Its totient is φ = 18156960.

The previous prime is 28749029. The next prime is 28749043. The reversal of 28749033 is 33094782.

It is not a de Polignac number, because 28749033 - 2² = 28749029 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28749013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27508 + ... + 28533.

It is an arithmetic number, because the mean of its divisors is an integer number (2802100).

Almost surely, 2^28749033 is an apocalyptic number.

It is an amenable number.

28749033 is a deficient number, since it is larger than the sum of its proper divisors (16084567).

28749033 is a wasteful number, since it uses less digits than its factorization.

28749033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56069 (or 56063 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 28749033 is about 5361.8124734086. The cubic root of 28749033 is about 306.3428490927.

The spelling of 28749033 in words is "twenty-eight million, seven hundred forty-nine thousand, thirty-three".