28566829 has 8 divisors (see below), whose sum is σ = 29054520. Its totient is φ = 28083456.

The previous prime is 28566809. The next prime is 28566833. The reversal of 28566829 is 92866582.

It can be written as a sum of positive squares in 4 ways, for example, as 13176900 + 15389929 = 3630^2 + 3923^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28566829 - 2¹³ = 28558637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28566809) 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, 13977 + ... + 15889.

It is an arithmetic number, because the mean of its divisors is an integer number (3631815).

Almost surely, 2^28566829 is an apocalyptic number.

It is an amenable number.

28566829 is a deficient number, since it is larger than the sum of its proper divisors (487691).

28566829 is a wasteful number, since it uses less digits than its factorization.

28566829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2159.

The product of its digits is 414720, while the sum is 46.

The square root of 28566829 is about 5344.7945704208. The cubic root of 28566829 is about 305.6943029063.

The spelling of 28566829 in words is "twenty-eight million, five hundred sixty-six thousand, eight hundred twenty-nine".