556906 has 8 divisors (see below), whose sum is σ = 954720. Its totient is φ = 238668.

The previous prime is 556891. The next prime is 556931. The reversal of 556906 is 609655.

It is a happy number.

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

It is an unprimeable number.

556906 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19876 + ... + 19903.

It is an arithmetic number, because the mean of its divisors is an integer number (119340).

2⁵⁵⁶⁹⁰⁶ is an apocalyptic number.

556906 is a deficient number, since it is larger than the sum of its proper divisors (397814).

556906 is a wasteful number, since it uses less digits than its factorization.

556906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39788.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 556906 is about 746.2613483224. The cubic root of 556906 is about 82.2736248934.

It can be divided in two parts, 55690 and 6, that added together give a square (55696 = 236²).

The spelling of 556906 in words is "five hundred fifty-six thousand, nine hundred six".