28090219 has 8 divisors (see below), whose sum is σ = 28659008. Its totient is φ = 27525960.

The previous prime is 28090217. The next prime is 28090253. The reversal of 28090219 is 91209082.

28090219 = T₈₈₂ + T₈₈₃ + ... + T₉₄₈.

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 28090219 - 2¹ = 28090217 is a prime.

It is a super-2 number, since 2×28090219² = 1578120806935922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28090211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13144 + ... + 15130.

It is an arithmetic number, because the mean of its divisors is an integer number (3582376).

Almost surely, 2^28090219 is an apocalyptic number.

28090219 is a deficient number, since it is larger than the sum of its proper divisors (568789).

28090219 is a wasteful number, since it uses less digits than its factorization.

28090219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 28090219 is about 5300.0206603371. The cubic root of 28090219 is about 303.9846880273.

The spelling of 28090219 in words is "twenty-eight million, ninety thousand, two hundred nineteen".