27221406 has 16 divisors (see below), whose sum is σ = 54810000. Its totient is φ = 9012608.

The previous prime is 27221399. The next prime is 27221429. The reversal of 27221406 is 60412272.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14331 + ... + 16118.

It is an arithmetic number, because the mean of its divisors is an integer number (3425625).

Almost surely, 2^27221406 is an apocalyptic number.

27221406 is an abundant number, since it is smaller than the sum of its proper divisors (27588594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27221406 is a wasteful number, since it uses less digits than its factorization.

27221406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30603.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 27221406 is about 5217.4137271257. The cubic root of 27221406 is about 300.8177909233.

Adding to 27221406 its reverse (60412272), we get a palindrome (87633678).

The spelling of 27221406 in words is "twenty-seven million, two hundred twenty-one thousand, four hundred six".