28082105 has 8 divisors (see below), whose sum is σ = 33737352. Its totient is φ = 22439808.

The previous prime is 28082101. The next prime is 28082107. The reversal of 28082105 is 50128082.

It can be written as a sum of positive squares in 4 ways, for example, as 10374841 + 17707264 = 3221^2 + 4208^2 .

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 28082105 - 2² = 28082101 is a prime.

It is a super-3 number, since 3×28082105³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28082101) 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 7 ways as a sum of consecutive naturals, for example, 2447 + ... + 7883.

It is an arithmetic number, because the mean of its divisors is an integer number (4217169).

Almost surely, 2^28082105 is an apocalyptic number.

It is an amenable number.

28082105 is a deficient number, since it is larger than the sum of its proper divisors (5655247).

28082105 is a wasteful number, since it uses less digits than its factorization.

28082105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6475.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 28082105 is about 5299.2551363376. The cubic root of 28082105 is about 303.9554160437.

It can be divided in two parts, 2808 and 2105, that added together give a cube (4913 = 17³).

The spelling of 28082105 in words is "twenty-eight million, eighty-two thousand, one hundred five".