27998271 has 16 divisors (see below), whose sum is σ = 47404800. Its totient is φ = 15998904.

The previous prime is 27998263. The next prime is 27998287. The reversal of 27998271 is 17289972.

It is not a de Polignac number, because 27998271 - 2³ = 27998263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27998251) 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, 73881 + ... + 74258.

It is an arithmetic number, because the mean of its divisors is an integer number (2962800).

Almost surely, 2^27998271 is an apocalyptic number.

27998271 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

27998271 is a deficient number, since it is larger than the sum of its proper divisors (19406529).

27998271 is a wasteful number, since it uses less digits than its factorization.

27998271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148155 (or 148149 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 27998271 is about 5291.3392444635. The cubic root of 27998271 is about 303.6526467466.

The spelling of 27998271 in words is "twenty-seven million, nine hundred ninety-eight thousand, two hundred seventy-one".