556387 has 8 divisors (see below), whose sum is σ = 605696. Its totient is φ = 508032.

The previous prime is 556373. The next prime is 556399. The reversal of 556387 is 783655.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 556387 - 2¹⁹ = 32099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (556327) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1483 + ... + 1819.

It is an arithmetic number, because the mean of its divisors is an integer number (75712).

2⁵⁵⁶³⁸⁷ is an apocalyptic number.

556387 is a deficient number, since it is larger than the sum of its proper divisors (49309).

556387 is a wasteful number, since it uses less digits than its factorization.

556387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477.

The product of its digits is 25200, while the sum is 34.

The square root of 556387 is about 745.9135338630. The cubic root of 556387 is about 82.2480590692.

The spelling of 556387 in words is "five hundred fifty-six thousand, three hundred eighty-seven".