27439984 has 80 divisors (see below), whose sum is σ = 63745920. Its totient is φ = 11278080.

The previous prime is 27439961. The next prime is 27439999. The reversal of 27439984 is 48993472.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153207 + ... + 153385.

It is an arithmetic number, because the mean of its divisors is an integer number (796824).

Almost surely, 2^27439984 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 27439984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31872960).

27439984 is an abundant number, since it is smaller than the sum of its proper divisors (36305936).

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

27439984 is a wasteful number, since it uses less digits than its factorization.

27439984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 272 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 27439984 is about 5238.3188142762. The cubic root of 27439984 is about 301.6207979804.

The spelling of 27439984 in words is "twenty-seven million, four hundred thirty-nine thousand, nine hundred eighty-four".