28843057 has 4 divisors (see below), whose sum is σ = 29315956. Its totient is φ = 28370160.

The previous prime is 28843039. The next prime is 28843063. The reversal of 28843057 is 75034882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6574096 + 22268961 = 2564^2 + 4719^2 .

It is a cyclic number.

It is not a de Polignac number, because 28843057 - 2⁷ = 28842929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28843457) 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, 236358 + ... + 236479.

It is an arithmetic number, because the mean of its divisors is an integer number (7328989).

Almost surely, 2^28843057 is an apocalyptic number.

It is an amenable number.

28843057 is a deficient number, since it is larger than the sum of its proper divisors (472899).

28843057 is an equidigital number, since it uses as much as digits as its factorization.

28843057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472898.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 28843057 is about 5370.5732468704. The cubic root of 28843057 is about 306.6764514574.

The spelling of 28843057 in words is "twenty-eight million, eight hundred forty-three thousand, fifty-seven".