275540 has 24 divisors (see below), whose sum is σ = 604800. Its totient is φ = 105248.

The previous prime is 275531. The next prime is 275543. The reversal of 275540 is 45572.

275540 is an esthetic number in base 16, because in such base its adjacent digits differ by 1.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a plaindrome in base 12.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275543) by changing a digit.

275540 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 7 ways as a sum of consecutive naturals, for example, 161 + ... + 759.

It is an arithmetic number, because the mean of its divisors is an integer number (25200).

2²⁷⁵⁵⁴⁰ is an apocalyptic number.

275540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 275540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302400).

275540 is an abundant number, since it is smaller than the sum of its proper divisors (329260).

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

275540 is a wasteful number, since it uses less digits than its factorization.

275540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 629 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 23.

The square root of 275540 is about 524.9190413769. The cubic root of 275540 is about 65.0721093233.

The spelling of 275540 in words is "two hundred seventy-five thousand, five hundred forty".