28236933 has 12 divisors (see below), whose sum is σ = 41086188. Its totient is φ = 18686400.

The previous prime is 28236899. The next prime is 28236947. The reversal of 28236933 is 33963282.

It can be written as a sum of positive squares in 2 ways, for example, as 23648769 + 4588164 = 4863^2 + 2142^2 .

It is not a de Polignac number, because 28236933 - 2⁹ = 28236421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28236973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10218 + ... + 12683.

It is an arithmetic number, because the mean of its divisors is an integer number (3423849).

Almost surely, 2^28236933 is an apocalyptic number.

It is an amenable number.

28236933 is a deficient number, since it is larger than the sum of its proper divisors (12849255).

28236933 is a wasteful number, since it uses less digits than its factorization.

28236933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23044 (or 23041 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 28236933 is about 5313.8435242299. The cubic root of 28236933 is about 304.5130022678.

The spelling of 28236933 in words is "twenty-eight million, two hundred thirty-six thousand, nine hundred thirty-three".