275868 has 36 divisors (see below), whose sum is σ = 713440. Its totient is φ = 89856.

The previous prime is 275837. The next prime is 275881. The reversal of 275868 is 868572.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×275868² = 152206306848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 2¹⁸ + 7⁴ + 8⁴ + 5⁵ + 6 + 8⁴ .

It is a congruent number.

It is an unprimeable number.

275868 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2796 + ... + 2892.

2²⁷⁵⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 275868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356720).

275868 is an abundant number, since it is smaller than the sum of its proper divisors (437572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

275868 is a wasteful number, since it uses less digits than its factorization.

275868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186 (or 181 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 275868 is about 525.2313775852. The cubic root of 275868 is about 65.0979194759.

Subtracting 275868 from its reverse (868572), we obtain a cube (592704 = 84³).

The spelling of 275868 in words is "two hundred seventy-five thousand, eight hundred sixty-eight".