275440 has 40 divisors (see below), whose sum is σ = 700848. Its totient is φ = 99840.

The previous prime is 275423. The next prime is 275447. The reversal of 275440 is 44572.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724 + ... + 1036.

2²⁷⁵⁴⁴⁰ is an apocalyptic number.

275440 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 275440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (350424).

275440 is an abundant number, since it is smaller than the sum of its proper divisors (425408).

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

275440 is a wasteful number, since it uses less digits than its factorization.

275440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 275440 is about 524.8237799490. The cubic root of 275440 is about 65.0642363003.

The spelling of 275440 in words is "two hundred seventy-five thousand, four hundred forty".