27489912 has 64 divisors (see below), whose sum is σ = 71884800. Its totient is φ = 8749440.

The previous prime is 27489911. The next prime is 27489919. The reversal of 27489912 is 21998472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27489911) 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, 88237 + ... + 88547.

It is an arithmetic number, because the mean of its divisors is an integer number (1123200).

Almost surely, 2^27489912 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 27489912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35942400).

27489912 is an abundant number, since it is smaller than the sum of its proper divisors (44394888).

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

27489912 is a wasteful number, since it uses less digits than its factorization.

27489912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476 (or 472 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 27489912 is about 5243.0822995639. The cubic root of 27489912 is about 301.8036236308.

It can be divided in two parts, 274899 and 12, that added together give a triangular number (274911 = T₇₄₁).

The spelling of 27489912 in words is "twenty-seven million, four hundred eighty-nine thousand, nine hundred twelve".