28751233 has 16 divisors (see below), whose sum is σ = 34940160. Its totient is φ = 23095296.

The previous prime is 28751207. The next prime is 28751243. The reversal of 28751233 is 33215782.

It is not a de Polignac number, because 28751233 - 2⁵ = 28751201 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 28751195 and 28751204.

It is not an unprimeable number, because it can be changed into a prime (28751243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42385 + ... + 43057.

It is an arithmetic number, because the mean of its divisors is an integer number (2183760).

Almost surely, 2^28751233 is an apocalyptic number.

It is an amenable number.

28751233 is a deficient number, since it is larger than the sum of its proper divisors (6188927).

28751233 is a wasteful number, since it uses less digits than its factorization.

28751233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056.

The product of its digits is 10080, while the sum is 31.

The square root of 28751233 is about 5362.0176239919. The cubic root of 28751233 is about 306.3506631187.

The spelling of 28751233 in words is "twenty-eight million, seven hundred fifty-one thousand, two hundred thirty-three".