28086219 has 24 divisors (see below), whose sum is σ = 47621600. Its totient is φ = 15614208.

The previous prime is 28086209. The next prime is 28086221. The reversal of 28086219 is 91268082.

28086219 is a `hidden beast` number, since 28 + 0 + 8 + 621 + 9 = 666.

It is not a de Polignac number, because 28086219 - 2⁴ = 28086203 is a prime.

It is a super-2 number, since 2×28086219² = 1577671395431922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28086209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3694 + ... + 8355.

Almost surely, 2^28086219 is an apocalyptic number.

28086219 is a deficient number, since it is larger than the sum of its proper divisors (19535381).

28086219 is a wasteful number, since it uses less digits than its factorization.

28086219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12099 (or 12096 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 28086219 is about 5299.6432898828. The cubic root of 28086219 is about 303.9702583727.

The spelling of 28086219 in words is "twenty-eight million, eighty-six thousand, two hundred nineteen".