28335993 has 16 divisors (see below), whose sum is σ = 43564416. Its totient is φ = 16047360.

The previous prime is 28335949. The next prime is 28335997. The reversal of 28335993 is 39953382.

It is not a de Polignac number, because 28335993 - 2¹⁴ = 28319609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28335997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3598 + ... + 8343.

It is an arithmetic number, because the mean of its divisors is an integer number (2722776).

Almost surely, 2^28335993 is an apocalyptic number.

It is an amenable number.

28335993 is a deficient number, since it is larger than the sum of its proper divisors (15228423).

28335993 is a wasteful number, since it uses less digits than its factorization.

28335993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12064.

The product of its digits is 174960, while the sum is 42.

The square root of 28335993 is about 5323.1563005420. The cubic root of 28335993 is about 304.8686812629.

The spelling of 28335993 in words is "twenty-eight million, three hundred thirty-five thousand, nine hundred ninety-three".