540028 has 6 divisors (see below), whose sum is σ = 945056. Its totient is φ = 270012.

The previous prime is 539993. The next prime is 540041. The reversal of 540028 is 820045.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 539987 and 540014.

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, 67500 + ... + 67507.

2⁵⁴⁰⁰²⁸ is an apocalyptic number.

It is an amenable number.

540028 is a deficient number, since it is larger than the sum of its proper divisors (405028).

540028 is a wasteful number, since it uses less digits than its factorization.

540028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135011 (or 135009 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 540028 is about 734.8659741749. The cubic root of 540028 is about 81.4339359493.

The spelling of 540028 in words is "five hundred forty thousand, twenty-eight".