28736133 has 4 divisors (see below), whose sum is σ = 38314848. Its totient is φ = 19157420.

The previous prime is 28736119. The next prime is 28736143. The reversal of 28736133 is 33163782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28736133 - 2⁸ = 28735877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28736094 and 28736103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28736143) 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, 4789353 + ... + 4789358.

It is an arithmetic number, because the mean of its divisors is an integer number (9578712).

Almost surely, 2^28736133 is an apocalyptic number.

It is an amenable number.

28736133 is a deficient number, since it is larger than the sum of its proper divisors (9578715).

28736133 is an equidigital number, since it uses as much as digits as its factorization.

28736133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9578714.

The product of its digits is 18144, while the sum is 33.

The square root of 28736133 is about 5360.6093870007. The cubic root of 28736133 is about 306.2970224618.

The spelling of 28736133 in words is "twenty-eight million, seven hundred thirty-six thousand, one hundred thirty-three".