273440 has 24 divisors (see below), whose sum is σ = 646380. Its totient is φ = 109312.

The previous prime is 273433. The next prime is 273457. The reversal of 273440 is 44372.

It is a happy number.

273440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 258064 + 15376 = 508^2 + 124^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

273440 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 (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695 + ... + 1014.

2²⁷³⁴⁴⁰ is an apocalyptic number.

273440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

273440 is an abundant number, since it is smaller than the sum of its proper divisors (372940).

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

273440 is a wasteful number, since it uses less digits than its factorization.

273440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1724 (or 1716 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 273440 is about 522.9149070356. The cubic root of 273440 is about 64.9063740818.

The spelling of 273440 in words is "two hundred seventy-three thousand, four hundred forty", and thus it is an iban number.