27840213 has 8 divisors (see below), whose sum is σ = 41244800. Its totient is φ = 18560124.

The previous prime is 27840209. The next prime is 27840233. The reversal of 27840213 is 31204872.

It is not a de Polignac number, because 27840213 - 2² = 27840209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1031119 = 27840213 / (2 + 7 + 8 + 4 + 0 + 2 + 1 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27840233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515533 + ... + 515586.

It is an arithmetic number, because the mean of its divisors is an integer number (5155600).

Almost surely, 2^27840213 is an apocalyptic number.

It is an amenable number.

27840213 is a deficient number, since it is larger than the sum of its proper divisors (13404587).

27840213 is a wasteful number, since it uses less digits than its factorization.

27840213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031128 (or 1031122 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 27840213 is about 5276.3825676310. The cubic root of 27840213 is about 303.0801670046.

The spelling of 27840213 in words is "twenty-seven million, eight hundred forty thousand, two hundred thirteen".