556890 has 32 divisors (see below), whose sum is σ = 1408320. Its totient is φ = 140544.

The previous prime is 556883. The next prime is 556891. The reversal of 556890 is 98655.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (556891) by changing a digit.

556890 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 15 ways as a sum of consecutive naturals, for example, 82 + ... + 1058.

It is an arithmetic number, because the mean of its divisors is an integer number (44010).

2⁵⁵⁶⁸⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (704160).

556890 is an abundant number, since it is smaller than the sum of its proper divisors (851430).

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

556890 is a wasteful number, since it uses less digits than its factorization.

556890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006.

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 556890 is about 746.2506281404. The cubic root of 556890 is about 82.2728369743.

The spelling of 556890 in words is "five hundred fifty-six thousand, eight hundred ninety".