27712005 has 32 divisors (see below), whose sum is σ = 45601920. Its totient is φ = 14365440.

The previous prime is 27711997. The next prime is 27712021. The reversal of 27712005 is 50021772.

It is not a de Polignac number, because 27712005 - 2³ = 27711997 is a prime.

It is a super-2 number, since 2×27712005² = 1535910442240050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153015 + ... + 153195.

It is an arithmetic number, because the mean of its divisors is an integer number (1425060).

Almost surely, 2^27712005 is an apocalyptic number.

It is an amenable number.

27712005 is a deficient number, since it is larger than the sum of its proper divisors (17889915).

27712005 is a wasteful number, since it uses less digits than its factorization.

27712005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 27712005 is about 5264.2193153401. The cubic root of 27712005 is about 302.6142090890.

Adding to 27712005 its reverse (50021772), we get a palindrome (77733777).

The spelling of 27712005 in words is "twenty-seven million, seven hundred twelve thousand, five".