28767433 has 4 divisors (see below), whose sum is σ = 28858500. Its totient is φ = 28676368.

The previous prime is 28767421. The next prime is 28767437. The reversal of 28767433 is 33476782.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11102224 + 17665209 = 3332^2 + 4203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28767433 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28767437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45058 + ... + 45691.

It is an arithmetic number, because the mean of its divisors is an integer number (7214625).

Almost surely, 2^28767433 is an apocalyptic number.

It is an amenable number.

28767433 is a deficient number, since it is larger than the sum of its proper divisors (91067).

28767433 is an equidigital number, since it uses as much as digits as its factorization.

28767433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91066.

The product of its digits is 169344, while the sum is 40.

The square root of 28767433 is about 5363.5280366565. The cubic root of 28767433 is about 306.4081904941.

The spelling of 28767433 in words is "twenty-eight million, seven hundred sixty-seven thousand, four hundred thirty-three".