28106219 has 8 divisors (see below), whose sum is σ = 30452400. Its totient is φ = 25837056.

The previous prime is 28106209. The next prime is 28106233. The reversal of 28106219 is 91260182.

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 28106219 - 2⁸ = 28105963 is a prime.

It is a super-2 number, since 2×28106219² = 1579919092951922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28106191 and 28106200.

It is not an unprimeable number, because it can be changed into a prime (28106209) 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, 18494 + ... + 19955.

It is an arithmetic number, because the mean of its divisors is an integer number (3806550).

Almost surely, 2^28106219 is an apocalyptic number.

28106219 is a deficient number, since it is larger than the sum of its proper divisors (2346181).

28106219 is a wasteful number, since it uses less digits than its factorization.

28106219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38509.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 28106219 is about 5301.5298735365. The cubic root of 28106219 is about 304.0423929511.

The spelling of 28106219 in words is "twenty-eight million, one hundred six thousand, two hundred nineteen".