27998275 has 12 divisors (see below), whose sum is σ = 34819200. Its totient is φ = 22333280.

The previous prime is 27998263. The next prime is 27998287. The reversal of 27998275 is 57289972.

It is an interprime number because it is at equal distance from previous prime (27998263) and next prime (27998287).

It is a de Polignac number, because none of the positive numbers 2^k-27998275 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8286 + ... + 11164.

It is an arithmetic number, because the mean of its divisors is an integer number (2901600).

It is a vampire number, since it can be written as 2879 ⋅ 9725 (with its own digits).

Almost surely, 2^27998275 is an apocalyptic number.

27998275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27998275 is a deficient number, since it is larger than the sum of its proper divisors (6820925).

27998275 is a wasteful number, since it uses less digits than its factorization.

27998275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3278 (or 3273 counting only the distinct ones).

The product of its digits is 635040, while the sum is 49.

The square root of 27998275 is about 5291.3396224397. The cubic root of 27998275 is about 303.6526612072.

The spelling of 27998275 in words is "twenty-seven million, nine hundred ninety-eight thousand, two hundred seventy-five".