28811283 has 8 divisors (see below), whose sum is σ = 38467008. Its totient is φ = 19181544.

The previous prime is 28811281. The next prime is 28811287. The reversal of 28811283 is 38211882.

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

It is not a de Polignac number, because 28811283 - 2¹ = 28811281 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (28811281) 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, 3741 + ... + 8462.

It is an arithmetic number, because the mean of its divisors is an integer number (4808376).

Almost surely, 2^28811283 is an apocalyptic number.

28811283 is a deficient number, since it is larger than the sum of its proper divisors (9655725).

28811283 is a wasteful number, since it uses less digits than its factorization.

28811283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12993.

The product of its digits is 6144, while the sum is 33.

The square root of 28811283 is about 5367.6142745171. The cubic root of 28811283 is about 306.5637967558.

The spelling of 28811283 in words is "twenty-eight million, eight hundred eleven thousand, two hundred eighty-three".