27998375 has 16 divisors (see below), whose sum is σ = 35761440. Its totient is φ = 21873600.

The previous prime is 27998359. The next prime is 27998393. The reversal of 27998375 is 57389972.

It is a happy number.

It is not a de Polignac number, because 27998375 - 2⁴ = 27998359 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2771 + ... + 7979.

It is an arithmetic number, because the mean of its divisors is an integer number (2235090).

Almost surely, 2^27998375 is an apocalyptic number.

27998375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27998375 is a deficient number, since it is larger than the sum of its proper divisors (7763065).

27998375 is an equidigital number, since it uses as much as digits as its factorization.

27998375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5267 (or 5257 counting only the distinct ones).

The product of its digits is 952560, while the sum is 50.

The square root of 27998375 is about 5291.3490718341. The cubic root of 27998375 is about 303.6530227203.

The spelling of 27998375 in words is "twenty-seven million, nine hundred ninety-eight thousand, three hundred seventy-five".