27772212 has 48 divisors (see below), whose sum is σ = 71124480. Its totient is φ = 8381568.

The previous prime is 27772207. The next prime is 27772231. The reversal of 27772212 is 21227772.

It is a self number, because there is not a number n which added to its sum of digits gives 27772212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6589 + ... + 9947.

It is an arithmetic number, because the mean of its divisors is an integer number (1481760).

Almost surely, 2^27772212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27772212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35562240).

27772212 is an abundant number, since it is smaller than the sum of its proper divisors (43352268).

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

27772212 is a wasteful number, since it uses less digits than its factorization.

27772212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3432 (or 3430 counting only the distinct ones).

The product of its digits is 5488, while the sum is 30.

The square root of 27772212 is about 5269.9347244534. The cubic root of 27772212 is about 302.8332034087.

Adding to 27772212 its reverse (21227772), we get a palindrome (48999984).

The spelling of 27772212 in words is "twenty-seven million, seven hundred seventy-two thousand, two hundred twelve".