27698 has 8 divisors (see below), whose sum is σ = 45360. Its totient is φ = 12580.

The previous prime is 27697. The next prime is 27701. The reversal of 27698 is 89672.

Added to its reverse (89672) it gives a triangular number (117370 = T₄₈₄).

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (27691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 608 + ... + 651.

It is an arithmetic number, because the mean of its divisors is an integer number (5670).

2²⁷⁶⁹⁸ is an apocalyptic number.

27698 is a deficient number, since it is larger than the sum of its proper divisors (17662).

27698 is a wasteful number, since it uses less digits than its factorization.

27698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272.

The product of its digits is 6048, while the sum is 32.

The square root of 27698 is about 166.4271612448. The cubic root of 27698 is about 30.2563222448.

Adding to 27698 its sum of digits (32), we get a triangular number (27730 = T₂₃₅).

Adding to 27698 its reverse (89672), we get a triangular number (117370 = T₄₈₄).

The spelling of 27698 in words is "twenty-seven thousand, six hundred ninety-eight".