28026085 has 4 divisors (see below), whose sum is σ = 33631308. Its totient is φ = 22420864.

The previous prime is 28026079. The next prime is 28026137. The reversal of 28026085 is 58062082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4464769 + 23561316 = 2113^2 + 4854^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28026085 is a prime.

It is a super-2 number, since 2×28026085² = 1570922880854450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2802604 + ... + 2802613.

It is an arithmetic number, because the mean of its divisors is an integer number (8407827).

Almost surely, 2^28026085 is an apocalyptic number.

It is an amenable number.

28026085 is a deficient number, since it is larger than the sum of its proper divisors (5605223).

28026085 is an equidigital number, since it uses as much as digits as its factorization.

28026085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5605222.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28026085 is about 5293.9668491595. The cubic root of 28026085 is about 303.7531648527.

The spelling of 28026085 in words is "twenty-eight million, twenty-six thousand, eighty-five".