27105312 has 96 divisors (see below), whose sum is σ = 78829632. Its totient is φ = 8100864.

The previous prime is 27105283. The next prime is 27105317. The reversal of 27105312 is 21350172.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27105317) 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, 45883 + ... + 46469.

It is an arithmetic number, because the mean of its divisors is an integer number (821142).

Almost surely, 2^27105312 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 27105312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39414816).

27105312 is an abundant number, since it is smaller than the sum of its proper divisors (51724320).

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

27105312 is a wasteful number, since it uses less digits than its factorization.

27105312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 27105312 is about 5206.2762124190. The cubic root of 27105312 is about 300.3895384249.

Adding to 27105312 its reverse (21350172), we get a palindrome (48455484).

The spelling of 27105312 in words is "twenty-seven million, one hundred five thousand, three hundred twelve".