556540 has 12 divisors (see below), whose sum is σ = 1168776. Its totient is φ = 222608.

The previous prime is 556537. The next prime is 556559. The reversal of 556540 is 45655.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13894 + ... + 13933.

It is an arithmetic number, because the mean of its divisors is an integer number (97398).

2⁵⁵⁶⁵⁴⁰ is an apocalyptic number.

It is an amenable number.

556540 is an abundant number, since it is smaller than the sum of its proper divisors (612236).

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

556540 is a wasteful number, since it uses less digits than its factorization.

556540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27836 (or 27834 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 556540 is about 746.0160856175. The cubic root of 556540 is about 82.2555974671.

The spelling of 556540 in words is "five hundred fifty-six thousand, five hundred forty".