27783228 has 48 divisors (see below), whose sum is σ = 71406720. Its totient is φ = 8337600.

The previous prime is 27783227. The next prime is 27783229. The reversal of 27783228 is 82238772.

It is an interprime number because it is at equal distance from previous prime (27783227) and next prime (27783229).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27783227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13423 + ... + 15353.

It is an arithmetic number, because the mean of its divisors is an integer number (1487640).

Almost surely, 2^27783228 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 27783228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35703360).

27783228 is an abundant number, since it is smaller than the sum of its proper divisors (43623492).

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

27783228 is a wasteful number, since it uses less digits than its factorization.

27783228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058 (or 2056 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 27783228 is about 5270.9797950666. The cubic root of 27783228 is about 302.8732382654.

It can be divided in two parts, 2778 and 3228, that added together give a palindrome (6006).

The spelling of 27783228 in words is "twenty-seven million, seven hundred eighty-three thousand, two hundred twenty-eight".