28636829 has 8 divisors (see below), whose sum is σ = 30941400. Its totient is φ = 26346816.

The previous prime is 28636813. The next prime is 28636837. The reversal of 28636829 is 92863682.

It can be written as a sum of positive squares in 4 ways, for example, as 525625 + 28111204 = 725^2 + 5302^2 .

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 28636829 - 2⁴ = 28636813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28636829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28636129) 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, 647 + ... + 7595.

It is an arithmetic number, because the mean of its divisors is an integer number (3867675).

Almost surely, 2^28636829 is an apocalyptic number.

It is an amenable number.

28636829 is a deficient number, since it is larger than the sum of its proper divisors (2304571).

28636829 is a wasteful number, since it uses less digits than its factorization.

28636829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7279.

The product of its digits is 248832, while the sum is 44.

The square root of 28636829 is about 5351.3389913180. The cubic root of 28636829 is about 305.9437897806.

The spelling of 28636829 in words is "twenty-eight million, six hundred thirty-six thousand, eight hundred twenty-nine".