28935993 has 16 divisors (see below), whose sum is σ = 40832000. Its totient is φ = 18176400.

The previous prime is 28935971. The next prime is 28936003. The reversal of 28935993 is 39953982.

It is not a de Polignac number, because 28935993 - 2²⁰ = 27887417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28935913) 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, 10068 + ... + 12618.

It is an arithmetic number, because the mean of its divisors is an integer number (2552000).

Almost surely, 2^28935993 is an apocalyptic number.

It is an amenable number.

28935993 is a deficient number, since it is larger than the sum of its proper divisors (11896007).

28935993 is a wasteful number, since it uses less digits than its factorization.

28935993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2772.

The product of its digits is 524880, while the sum is 48.

The square root of 28935993 is about 5379.2186235549. The cubic root of 28935993 is about 307.0054818347.

The spelling of 28935993 in words is "twenty-eight million, nine hundred thirty-five thousand, nine hundred ninety-three".