556420 has 24 divisors (see below), whose sum is σ = 1197504. Its totient is φ = 217056.

The previous prime is 556403. The next prime is 556441. The reversal of 556420 is 24655.

556420 is nontrivially palindromic in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 556391 and 556400.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 537 + ... + 1183.

It is an arithmetic number, because the mean of its divisors is an integer number (49896).

2⁵⁵⁶⁴²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598752).

556420 is an abundant number, since it is smaller than the sum of its proper divisors (641084).

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

556420 is a wasteful number, since it uses less digits than its factorization.

556420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699 (or 697 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 556420 is about 745.9356540614. The cubic root of 556420 is about 82.2496851150.

The spelling of 556420 in words is "five hundred fifty-six thousand, four hundred twenty".