27399290 has 16 divisors (see below), whose sum is σ = 49527720. Its totient is φ = 10913280.

The previous prime is 27399289. The next prime is 27399293. The reversal of 27399290 is 9299372.

It can be written as a sum of positive squares in 4 ways, for example, as 25110121 + 2289169 = 5011^2 + 1513^2 .

It is not an unprimeable number, because it can be changed into a prime (27399293) 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, 3275 + ... + 8094.

Almost surely, 2^27399290 is an apocalyptic number.

27399290 is a deficient number, since it is larger than the sum of its proper divisors (22128430).

27399290 is a wasteful number, since it uses less digits than its factorization.

27399290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11617.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 27399290 is about 5234.4331116177. The cubic root of 27399290 is about 301.4716211519.

The spelling of 27399290 in words is "twenty-seven million, three hundred ninety-nine thousand, two hundred ninety".