28845829 has 4 divisors (see below), whose sum is σ = 29625484. Its totient is φ = 28066176.

The previous prime is 28845811. The next prime is 28845851. The reversal of 28845829 is 92854882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92854882 = 2 ⋅46427441.

It can be written as a sum of positive squares in 2 ways, for example, as 11189025 + 17656804 = 3345^2 + 4202^2 .

It is a cyclic number.

It is not a de Polignac number, because 28845829 - 2⁹ = 28845317 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 (28845899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389772 + ... + 389845.

It is an arithmetic number, because the mean of its divisors is an integer number (7406371).

Almost surely, 2^28845829 is an apocalyptic number.

It is an amenable number.

28845829 is a deficient number, since it is larger than the sum of its proper divisors (779655).

28845829 is an equidigital number, since it uses as much as digits as its factorization.

28845829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779654.

The product of its digits is 368640, while the sum is 46.

The square root of 28845829 is about 5370.8313136795. The cubic root of 28845829 is about 306.6862756575.

The spelling of 28845829 in words is "twenty-eight million, eight hundred forty-five thousand, eight hundred twenty-nine".