28205093 has 8 divisors (see below), whose sum is σ = 32536512. Its totient is φ = 23949216.

The previous prime is 28205087. The next prime is 28205147. The reversal of 28205093 is 39050282.

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 28205093 - 2⁴ = 28205077 is a prime.

It is a super-2 number, since 2×28205093² = 1591054542277298, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28205393) 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, 18080 + ... + 19577.

It is an arithmetic number, because the mean of its divisors is an integer number (4067064).

Almost surely, 2^28205093 is an apocalyptic number.

It is an amenable number.

28205093 is a deficient number, since it is larger than the sum of its proper divisors (4331419).

28205093 is a wasteful number, since it uses less digits than its factorization.

28205093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37771.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 28205093 is about 5310.8467309837. The cubic root of 28205093 is about 304.3985028098.

The spelling of 28205093 in words is "twenty-eight million, two hundred five thousand, ninety-three".