28883893 has 4 divisors (see below), whose sum is σ = 28894860. Its totient is φ = 28872928.

The previous prime is 28883891. The next prime is 28883903. The reversal of 28883893 is 39838882.

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 20629764 + 8254129 = 4542^2 + 2873^2 .

It is a cyclic number.

It is not a de Polignac number, because 28883893 - 2¹ = 28883891 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28883891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1113 + ... + 7681.

It is an arithmetic number, because the mean of its divisors is an integer number (7223715).

Almost surely, 2^28883893 is an apocalyptic number.

It is an amenable number.

28883893 is a deficient number, since it is larger than the sum of its proper divisors (10967).

28883893 is an equidigital number, since it uses as much as digits as its factorization.

28883893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10966.

The product of its digits is 663552, while the sum is 49.

The square root of 28883893 is about 5374.3737309569. The cubic root of 28883893 is about 306.8211140474.

The spelling of 28883893 in words is "twenty-eight million, eight hundred eighty-three thousand, eight hundred ninety-three".