27291272 has 12 divisors (see below), whose sum is σ = 51198855. Its totient is φ = 13638248.

The previous prime is 27291263. The next prime is 27291293. The reversal of 27291272 is 27219272.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 13645636 + 13645636 = 3694^2 + 3694^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3694.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 13853 + ... + 15699.

Almost surely, 2^27291272 is an apocalyptic number.

It is an amenable number.

27291272 is a deficient number, since it is larger than the sum of its proper divisors (23907583).

27291272 is an frugal number, since it uses more digits than its factorization.

27291272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3700 (or 1849 counting only the distinct ones).

The product of its digits is 7056, while the sum is 32.

The square root of 27291272 is about 5224.1048994062. The cubic root of 27291272 is about 301.0749290104.

Multiplying 27291272 by its sum of digits (32), we get a square (873320704 = 29552²).

The spelling of 27291272 in words is "twenty-seven million, two hundred ninety-one thousand, two hundred seventy-two".