28827231 has 8 divisors (see below), whose sum is σ = 38493360. Its totient is φ = 19189632.

The previous prime is 28827209. The next prime is 28827233. The reversal of 28827231 is 13272882.

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

It is not a de Polignac number, because 28827231 - 2⁹ = 28826719 is a prime.

It is a super-2 number, since 2×28827231² = 1662018494254722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28827192 and 28827201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28827233) 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 7 ways as a sum of consecutive naturals, for example, 4650 + ... + 8903.

It is an arithmetic number, because the mean of its divisors is an integer number (4811670).

Almost surely, 2^28827231 is an apocalyptic number.

28827231 is a deficient number, since it is larger than the sum of its proper divisors (9666129).

28827231 is a wasteful number, since it uses less digits than its factorization.

28827231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14265.

The product of its digits is 10752, while the sum is 33.

The square root of 28827231 is about 5369.0996451919. The cubic root of 28827231 is about 306.6203507295.

The spelling of 28827231 in words is "twenty-eight million, eight hundred twenty-seven thousand, two hundred thirty-one".