28268829 has 6 divisors (see below), whose sum is σ = 40832766. Its totient is φ = 18845880.

The previous prime is 28268819. The next prime is 28268833. The reversal of 28268829 is 92886282.

It can be written as a sum of positive squares in only one way, i.e., 24651225 + 3617604 = 4965^2 + 1902^2 .

It is not a de Polignac number, because 28268829 - 2⁴ = 28268813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28268819) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1570482 + ... + 1570499.

It is an arithmetic number, because the mean of its divisors is an integer number (6805461).

Almost surely, 2^28268829 is an apocalyptic number.

It is an amenable number.

28268829 is a deficient number, since it is larger than the sum of its proper divisors (12563937).

28268829 is a wasteful number, since it uses less digits than its factorization.

28268829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140987 (or 3140984 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 28268829 is about 5316.8438946428. The cubic root of 28268829 is about 304.6276168389.

The spelling of 28268829 in words is "twenty-eight million, two hundred sixty-eight thousand, eight hundred twenty-nine".