540404 has 6 divisors (see below), whose sum is σ = 945714. Its totient is φ = 270200.

The previous prime is 540391. The next prime is 540433. The reversal of 540404 is 404045.

It can be written as a sum of positive squares in only one way, i.e., 300304 + 240100 = 548^2 + 490^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67547 + ... + 67554.

It is an arithmetic number, because the mean of its divisors is an integer number (157619).

2⁵⁴⁰⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

540404 is a deficient number, since it is larger than the sum of its proper divisors (405310).

540404 is a wasteful number, since it uses less digits than its factorization.

540404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135105 (or 135103 counting only the distinct ones).

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

The square root of 540404 is about 735.1217586223. The cubic root of 540404 is about 81.4528313007.

Adding to 540404 its reverse (404045), we get a palindrome (944449).

The spelling of 540404 in words is "five hundred forty thousand, four hundred four".