28841893 has 4 divisors (see below), whose sum is σ = 28853388. Its totient is φ = 28830400.

The previous prime is 28841887. The next prime is 28841909. The reversal of 28841893 is 39814882.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 21696964 + 7144929 = 4658^2 + 2673^2 .

It is a cyclic number.

It is not a de Polignac number, because 28841893 - 2¹⁷ = 28710821 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 (28845893) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 196 + ... + 7597.

It is an arithmetic number, because the mean of its divisors is an integer number (7213347).

Almost surely, 2^28841893 is an apocalyptic number.

It is an amenable number.

28841893 is a deficient number, since it is larger than the sum of its proper divisors (11495).

28841893 is an equidigital number, since it uses as much as digits as its factorization.

28841893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11494.

The product of its digits is 110592, while the sum is 43.

The square root of 28841893 is about 5370.4648774571. The cubic root of 28841893 is about 306.6723259563.

The spelling of 28841893 in words is "twenty-eight million, eight hundred forty-one thousand, eight hundred ninety-three".