28843745 has 16 divisors (see below), whose sum is σ = 40037760. Its totient is φ = 19538304.

The previous prime is 28843723. The next prime is 28843753. The reversal of 28843745 is 54734882.

It is a cyclic number.

It is not a de Polignac number, because 28843745 - 2²⁰ = 27795169 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2060 + ... + 7869.

It is an arithmetic number, because the mean of its divisors is an integer number (2502360).

Almost surely, 2^28843745 is an apocalyptic number.

It is an amenable number.

28843745 is a deficient number, since it is larger than the sum of its proper divisors (11194015).

28843745 is an equidigital number, since it uses as much as digits as its factorization.

28843745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10024.

The product of its digits is 215040, while the sum is 41.

The square root of 28843745 is about 5370.6372992411. The cubic root of 28843745 is about 306.6788898457.

The spelling of 28843745 in words is "twenty-eight million, eight hundred forty-three thousand, seven hundred forty-five".