28086413 has 8 divisors (see below), whose sum is σ = 29533080. Its totient is φ = 26671680.

The previous prime is 28086391. The next prime is 28086433. The reversal of 28086413 is 31468082.

It can be written as a sum of positive squares in 4 ways, for example, as 6165289 + 21921124 = 2483^2 + 4682^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28086413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28086413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28086433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6170 + ... + 9707.

It is an arithmetic number, because the mean of its divisors is an integer number (3691635).

Almost surely, 2^28086413 is an apocalyptic number.

It is an amenable number.

28086413 is a deficient number, since it is larger than the sum of its proper divisors (1446667).

28086413 is a wasteful number, since it uses less digits than its factorization.

28086413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15967.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28086413 is about 5299.6615929699. The cubic root of 28086413 is about 303.9709582425.

The spelling of 28086413 in words is "twenty-eight million, eighty-six thousand, four hundred thirteen".