275978 has 8 divisors (see below), whose sum is σ = 438372. Its totient is φ = 129856.

The previous prime is 275969. The next prime is 275981. The reversal of 275978 is 879572.

It can be written as a sum of positive squares in 2 ways, for example, as 237169 + 38809 = 487^2 + 197^2 .

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

It is an unprimeable number.

275978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 4025 + ... + 4092.

2²⁷⁵⁹⁷⁸ is an apocalyptic number.

275978 is a deficient number, since it is larger than the sum of its proper divisors (162394).

275978 is a wasteful number, since it uses less digits than its factorization.

275978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8136.

The product of its digits is 35280, while the sum is 38.

The square root of 275978 is about 525.3360829031. The cubic root of 275978 is about 65.1065707386.

The spelling of 275978 in words is "two hundred seventy-five thousand, nine hundred seventy-eight".