540440 has 32 divisors (see below), whose sum is σ = 1242000. Its totient is φ = 211584.

The previous prime is 540437. The next prime is 540461. The reversal of 540440 is 44045.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2246 + ... + 2474.

2⁵⁴⁰⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 540440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (621000).

540440 is an abundant number, since it is smaller than the sum of its proper divisors (701560).

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

540440 is a wasteful number, since it uses less digits than its factorization.

540440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 540440 is about 735.1462439542. The cubic root of 540440 is about 81.4546399702.

Adding to 540440 its reverse (44045), we get a palindrome (584485).

The spelling of 540440 in words is "five hundred forty thousand, four hundred forty".