27861222 has 32 divisors (see below), whose sum is σ = 58643424. Its totient is φ = 8812800.

The previous prime is 27861221. The next prime is 27861227. The reversal of 27861222 is 22216872.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 27861222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27861221) 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 15 ways as a sum of consecutive naturals, for example, 7572 + ... + 10632.

It is an arithmetic number, because the mean of its divisors is an integer number (1832607).

Almost surely, 2^27861222 is an apocalyptic number.

27861222 is an abundant number, since it is smaller than the sum of its proper divisors (30782202).

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

27861222 is a wasteful number, since it uses less digits than its factorization.

27861222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3144.

The product of its digits is 5376, while the sum is 30.

The square root of 27861222 is about 5278.3730447933. The cubic root of 27861222 is about 303.1563854136.

The spelling of 27861222 in words is "twenty-seven million, eight hundred sixty-one thousand, two hundred twenty-two".