28119393 has 20 divisors (see below), whose sum is σ = 42166080. Its totient is φ = 18674712.

The previous prime is 28119391. The next prime is 28119433. The reversal of 28119393 is 39391182.

It is not a de Polignac number, because 28119393 - 2¹ = 28119391 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28119391) 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 19 ways as a sum of consecutive naturals, for example, 28596 + ... + 29562.

It is an arithmetic number, because the mean of its divisors is an integer number (2108304).

Almost surely, 2^28119393 is an apocalyptic number.

It is an amenable number.

28119393 is a deficient number, since it is larger than the sum of its proper divisors (14046687).

28119393 is an equidigital number, since it uses as much as digits as its factorization.

28119393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338 (or 1329 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 28119393 is about 5302.7721995198. The cubic root of 28119393 is about 304.0898893057.

The spelling of 28119393 in words is "twenty-eight million, one hundred nineteen thousand, three hundred ninety-three".