27818341 has 4 divisors (see below), whose sum is σ = 29454732. Its totient is φ = 26181952.

The previous prime is 27818327. The next prime is 27818381. The reversal of 27818341 is 14381872.

27818341 = 3729² + 3730².

It is a happy number.

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 13912900 + 13905441 = 3730^2 + 3729^2 .

It is a cyclic number.

It is not a de Polignac number, because 27818341 - 2⁵ = 27818309 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27818297 and 27818306.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27818311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 818170 + ... + 818203.

It is an arithmetic number, because the mean of its divisors is an integer number (7363683).

Almost surely, 2^27818341 is an apocalyptic number.

27818341 is the 3730-th centered square number.

It is an amenable number.

27818341 is a deficient number, since it is larger than the sum of its proper divisors (1636391).

27818341 is a wasteful number, since it uses less digits than its factorization.

27818341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636390.

The product of its digits is 10752, while the sum is 34.

The square root of 27818341 is about 5274.3095282700. The cubic root of 27818341 is about 303.0007769734. Note that the first 3 decimals are identical.

The spelling of 27818341 in words is "twenty-seven million, eight hundred eighteen thousand, three hundred forty-one".