27772224 has 112 divisors (see below), whose sum is σ = 80954880. Its totient is φ = 8363520.

The previous prime is 27772207. The next prime is 27772231. The reversal of 27772224 is 42227772.

It is a congruent number.

It is an unprimeable number.

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, 83739 + ... + 84069.

Almost surely, 2^27772224 is an apocalyptic number.

27772224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27772224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40477440).

27772224 is an abundant number, since it is smaller than the sum of its proper divisors (53182656).

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

27772224 is a wasteful number, since it uses less digits than its factorization.

27772224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388 (or 378 counting only the distinct ones).

The product of its digits is 21952, while the sum is 33.

The square root of 27772224 is about 5269.9358629873. The cubic root of 27772224 is about 302.8332470255.

Adding to 27772224 its reverse (42227772), we get a palindrome (69999996).

The spelling of 27772224 in words is "twenty-seven million, seven hundred seventy-two thousand, two hundred twenty-four".