28319193 has 16 divisors (see below), whose sum is σ = 47948160. Its totient is φ = 16182288.

The previous prime is 28319191. The next prime is 28319231. The reversal of 28319193 is 39191382.

It is not a de Polignac number, because 28319193 - 2¹ = 28319191 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28319191) 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 15 ways as a sum of consecutive naturals, for example, 74730 + ... + 75107.

It is an arithmetic number, because the mean of its divisors is an integer number (2996760).

Almost surely, 2^28319193 is an apocalyptic number.

It is an amenable number.

28319193 is a deficient number, since it is larger than the sum of its proper divisors (19628967).

28319193 is a wasteful number, since it uses less digits than its factorization.

28319193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149853 (or 149847 counting only the distinct ones).

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

The square root of 28319193 is about 5321.5780554268. The cubic root of 28319193 is about 304.8084186093.

The spelling of 28319193 in words is "twenty-eight million, three hundred nineteen thousand, one hundred ninety-three".