28283994393 has 16 divisors (see below), whose sum is σ = 37867896576. Its totient is φ = 18778106880.

The previous prime is 28283994353. The next prime is 28283994407. The reversal of 28283994393 is 39349938282.

It is not a de Polignac number, because 28283994393 - 2¹² = 28283990297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28283994313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2231871 + ... + 2244507.

It is an arithmetic number, because the mean of its divisors is an integer number (2366743536).

Almost surely, 2^28283994393 is an apocalyptic number.

It is an amenable number.

28283994393 is a deficient number, since it is larger than the sum of its proper divisors (9583902183).

28283994393 is a wasteful number, since it uses less digits than its factorization.

28283994393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15664.

The product of its digits is 20155392, while the sum is 60.

The spelling of 28283994393 in words is "twenty-eight billion, two hundred eighty-three million, nine hundred ninety-four thousand, three hundred ninety-three".