27828813 has 8 divisors (see below), whose sum is σ = 39287808. Its totient is φ = 17461184.

The previous prime is 27828809. The next prime is 27828883. The reversal of 27828813 is 31882872.

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 27828813 - 2² = 27828809 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27828883) 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, 272781 + ... + 272882.

It is an arithmetic number, because the mean of its divisors is an integer number (4910976).

Almost surely, 2^27828813 is an apocalyptic number.

It is an amenable number.

27828813 is a deficient number, since it is larger than the sum of its proper divisors (11458995).

27828813 is a wasteful number, since it uses less digits than its factorization.

27828813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545683.

The product of its digits is 43008, while the sum is 39.

The square root of 27828813 is about 5275.3021714400. The cubic root of 27828813 is about 303.0387929723.

The spelling of 27828813 in words is "twenty-seven million, eight hundred twenty-eight thousand, eight hundred thirteen".