27281868 has 12 divisors (see below), whose sum is σ = 63657720. Its totient is φ = 9093952.

The previous prime is 27281861. The next prime is 27281873. The reversal of 27281868 is 86818272.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (27281861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136733 + ... + 1136756.

It is an arithmetic number, because the mean of its divisors is an integer number (5304810).

Almost surely, 2^27281868 is an apocalyptic number.

It is an amenable number.

27281868 is an abundant number, since it is smaller than the sum of its proper divisors (36375852).

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

27281868 is a wasteful number, since it uses less digits than its factorization.

27281868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273496 (or 2273494 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 27281868 is about 5223.2047633613. The cubic root of 27281868 is about 301.0403436688.

The spelling of 27281868 in words is "twenty-seven million, two hundred eighty-one thousand, eight hundred sixty-eight".