275408 has 20 divisors (see below), whose sum is σ = 610080. Its totient is φ = 117984.

The previous prime is 275399. The next prime is 275419. The reversal of 275408 is 804572.

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

275408 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 3 ways as a sum of consecutive naturals, for example, 1118 + ... + 1341.

It is an arithmetic number, because the mean of its divisors is an integer number (30504).

2²⁷⁵⁴⁰⁸ is an apocalyptic number.

275408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

275408 is an abundant number, since it is smaller than the sum of its proper divisors (334672).

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

275408 is a wasteful number, since it uses less digits than its factorization.

275408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474 (or 2468 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 275408 is about 524.7932926401. The cubic root of 275408 is about 65.0617165305.

The spelling of 275408 in words is "two hundred seventy-five thousand, four hundred eight".