28133183 has 8 divisors (see below), whose sum is σ = 30517200. Its totient is φ = 25780608.

The previous prime is 28133177. The next prime is 28133191. The reversal of 28133183 is 38133182.

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

It is not a de Polignac number, because 28133183 - 2¹⁶ = 28067647 is a prime.

It is a super-2 number, since 2×28133183² = 1582951971422978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28133143) 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, 5978 + ... + 9591.

It is an arithmetic number, because the mean of its divisors is an integer number (3814650).

Almost surely, 2^28133183 is an apocalyptic number.

28133183 is a deficient number, since it is larger than the sum of its proper divisors (2384017).

28133183 is a wasteful number, since it uses less digits than its factorization.

28133183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15721.

The product of its digits is 3456, while the sum is 29.

The square root of 28133183 is about 5304.0723034288. The cubic root of 28133183 is about 304.1395906425.

Subtracting 28133183 from its reverse (38133182), we obtain a palindrome (9999999).

The spelling of 28133183 in words is "twenty-eight million, one hundred thirty-three thousand, one hundred eighty-three".