27081216 has 100 divisors (see below), whose sum is σ = 80954082. Its totient is φ = 9013248.

The previous prime is 27081211. The next prime is 27081233. The reversal of 27081216 is 61218072.

It can be written as a sum of positive squares in only one way, i.e., 25401600 + 1679616 = 5040^2 + 1296^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 27081216.

It is not an unprimeable number, because it can be changed into a prime (27081211) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 41146 + ... + 41798.

Almost surely, 2^27081216 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 27081216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40477041).

27081216 is an abundant number, since it is smaller than the sum of its proper divisors (53872866).

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

27081216 is an frugal number, since it uses more digits than its factorization.

27081216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 683 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 27081216 is about 5203.9615678827. The cubic root of 27081216 is about 300.3004989009.

Adding to 27081216 its reverse (61218072), we get a palindrome (88299288).

The spelling of 27081216 in words is "twenty-seven million, eighty-one thousand, two hundred sixteen".