275998 has 4 divisors (see below), whose sum is σ = 414000. Its totient is φ = 137998.

The previous prime is 275987. The next prime is 275999. The reversal of 275998 is 899572.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 275998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68998 + ... + 69001.

It is an arithmetic number, because the mean of its divisors is an integer number (103500).

2²⁷⁵⁹⁹⁸ is an apocalyptic number.

275998 is a deficient number, since it is larger than the sum of its proper divisors (138002).

275998 is a wasteful number, since it uses less digits than its factorization.

275998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138001.

The product of its digits is 45360, while the sum is 40.

The square root of 275998 is about 525.3551179916. The cubic root of 275998 is about 65.1081434485.

The spelling of 275998 in words is "two hundred seventy-five thousand, nine hundred ninety-eight".