28086101 has 4 divisors (see below), whose sum is σ = 28182252. Its totient is φ = 27989952.

The previous prime is 28086089. The next prime is 28086103. The reversal of 28086101 is 10168082.

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 14938225 + 13147876 = 3865^2 + 3626^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28086101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28086103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47636 + ... + 48221.

It is an arithmetic number, because the mean of its divisors is an integer number (7045563).

Almost surely, 2^28086101 is an apocalyptic number.

It is an amenable number.

28086101 is a deficient number, since it is larger than the sum of its proper divisors (96151).

28086101 is an equidigital number, since it uses as much as digits as its factorization.

28086101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96150.

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 28086101 is about 5299.6321570464. The cubic root of 28086101 is about 303.9698326770.

The spelling of 28086101 in words is "twenty-eight million, eighty-six thousand, one hundred one".