27128213 has 16 divisors (see below), whose sum is σ = 31920000. Its totient is φ = 23044896.

The previous prime is 27128203. The next prime is 27128221. The reversal of 27128213 is 31282172.

It is not a de Polignac number, because 27128213 - 2¹⁴ = 27111829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27128203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47393 + ... + 47961.

It is an arithmetic number, because the mean of its divisors is an integer number (1995000).

Almost surely, 2^27128213 is an apocalyptic number.

It is an amenable number.

27128213 is a deficient number, since it is larger than the sum of its proper divisors (4791787).

27128213 is an equidigital number, since it uses as much as digits as its factorization.

27128213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729 (or 715 counting only the distinct ones).

The product of its digits is 1344, while the sum is 26.

The square root of 27128213 is about 5208.4751127369. The cubic root of 27128213 is about 300.4741132902.

The spelling of 27128213 in words is "twenty-seven million, one hundred twenty-eight thousand, two hundred thirteen".