556394 has 16 divisors (see below), whose sum is σ = 884520. Its totient is φ = 262080.

The previous prime is 556373. The next prime is 556399. The reversal of 556394 is 493655.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 375769 + 180625 = 613^2 + 425^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 556394.

It is not an unprimeable number, because it can be changed into a prime (556399) 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, 2984 + ... + 3164.

2⁵⁵⁶³⁹⁴ is an apocalyptic number.

556394 is a deficient number, since it is larger than the sum of its proper divisors (328126).

556394 is a wasteful number, since it uses less digits than its factorization.

556394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265.

The product of its digits is 16200, while the sum is 32.

The square root of 556394 is about 745.9182260811. The cubic root of 556394 is about 82.2484039934.

The spelling of 556394 in words is "five hundred fifty-six thousand, three hundred ninety-four".