27988884 has 144 divisors (see below), whose sum is σ = 92252160. Its totient is φ = 6937920.

The previous prime is 27988879. The next prime is 27988889. The reversal of 27988884 is 48888972.

It is an interprime number because it is at equal distance from previous prime (27988879) and next prime (27988889).

It is a self number, because there is not a number n which added to its sum of digits gives 27988884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27988889) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63537 + ... + 63975.

It is an arithmetic number, because the mean of its divisors is an integer number (640640).

Almost surely, 2^27988884 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 27988884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46126080).

27988884 is an abundant number, since it is smaller than the sum of its proper divisors (64263276).

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

27988884 is a wasteful number, since it uses less digits than its factorization.

27988884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 485 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 27988884 is about 5290.4521545894. The cubic root of 27988884 is about 303.6187076746.

It can be divided in two parts, 279888 and 84, that added together give a palindrome (279972).

The spelling of 27988884 in words is "twenty-seven million, nine hundred eighty-eight thousand, eight hundred eighty-four".