28538313 has 8 divisors (see below), whose sum is σ = 38420928. Its totient is φ = 18840624.

The previous prime is 28538311. The next prime is 28538317. The reversal of 28538313 is 31383582.

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

It is not a de Polignac number, because 28538313 - 2¹ = 28538311 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 (28538311) 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, 45870 + ... + 46487.

It is an arithmetic number, because the mean of its divisors is an integer number (4802616).

Almost surely, 2^28538313 is an apocalyptic number.

It is an amenable number.

28538313 is a deficient number, since it is larger than the sum of its proper divisors (9882615).

28538313 is a wasteful number, since it uses less digits than its factorization.

28538313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92463.

The product of its digits is 17280, while the sum is 33.

The square root of 28538313 is about 5342.1262620795. The cubic root of 28538313 is about 305.5925522488.

The spelling of 28538313 in words is "twenty-eight million, five hundred thirty-eight thousand, three hundred thirteen".