28831327 has 4 divisors (see below), whose sum is σ = 32950096. Its totient is φ = 24712560.

The previous prime is 28831321. The next prime is 28831349. The reversal of 28831327 is 72313882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72313882 = 2 ⋅36156941.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28831327 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28831292 and 28831301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28831321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2059374 + ... + 2059387.

It is an arithmetic number, because the mean of its divisors is an integer number (8237524).

Almost surely, 2^28831327 is an apocalyptic number.

28831327 is a deficient number, since it is larger than the sum of its proper divisors (4118769).

28831327 is an equidigital number, since it uses as much as digits as its factorization.

28831327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4118768.

The product of its digits is 16128, while the sum is 34.

The square root of 28831327 is about 5369.4810736234. The cubic root of 28831327 is about 306.6348723864.

The spelling of 28831327 in words is "twenty-eight million, eight hundred thirty-one thousand, three hundred twenty-seven".