28082993 has 8 divisors (see below), whose sum is σ = 29062656. Its totient is φ = 27108000.

The previous prime is 28082981. The next prime is 28083001. The reversal of 28082993 is 39928082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28082993 - 2²⁰ = 27034417 is a prime.

It is a super-3 number, since 3×28082993³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28082993.

It is not an unprimeable number, because it can be changed into a prime (28082953) 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 7 ways as a sum of consecutive naturals, for example, 14693 + ... + 16493.

It is an arithmetic number, because the mean of its divisors is an integer number (3632832).

Almost surely, 2^28082993 is an apocalyptic number.

It is an amenable number.

28082993 is a deficient number, since it is larger than the sum of its proper divisors (979663).

28082993 is a wasteful number, since it uses less digits than its factorization.

28082993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 28082993 is about 5299.3389210353. The cubic root of 28082993 is about 303.9586198582.

The spelling of 28082993 in words is "twenty-eight million, eighty-two thousand, nine hundred ninety-three".