28751133 has 8 divisors (see below), whose sum is σ = 39226528. Its totient is φ = 18721584.

The previous prime is 28751119. The next prime is 28751141. The reversal of 28751133 is 33115782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28751133 - 2¹⁰ = 28750109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28751133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28751153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111310 + ... + 111567.

It is an arithmetic number, because the mean of its divisors is an integer number (4903316).

Almost surely, 2^28751133 is an apocalyptic number.

It is an amenable number.

28751133 is a deficient number, since it is larger than the sum of its proper divisors (10475395).

28751133 is a wasteful number, since it uses less digits than its factorization.

28751133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222923.

The product of its digits is 5040, while the sum is 30.

The square root of 28751133 is about 5362.0082991357. The cubic root of 28751133 is about 306.3503079444.

The spelling of 28751133 in words is "twenty-eight million, seven hundred fifty-one thousand, one hundred thirty-three".