27994005 has 60 divisors (see below), whose sum is σ = 54471780. Its totient is φ = 13747968.

The previous prime is 27993997. The next prime is 27994027. The reversal of 27994005 is 50049972.

It can be written as a sum of positive squares in 6 ways, for example, as 1306449 + 26687556 = 1143^2 + 5166^2 .

It is not a de Polignac number, because 27994005 - 2³ = 27993997 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 68241 + ... + 68649.

It is an arithmetic number, because the mean of its divisors is an integer number (907863).

Almost surely, 2^27994005 is an apocalyptic number.

It is an amenable number.

27994005 is a deficient number, since it is larger than the sum of its proper divisors (26477775).

27994005 is a wasteful number, since it uses less digits than its factorization.

27994005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 430 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 27994005 is about 5290.9361175505. The cubic root of 27994005 is about 303.6372237944.

The spelling of 27994005 in words is "twenty-seven million, nine hundred ninety-four thousand, five".