556111830 has 64 divisors (see below), whose sum is σ = 1388793600. Its totient is φ = 142343040.

The previous prime is 556111789. The next prime is 556111841. The reversal of 556111830 is 38111655.

556111830 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153945 + ... + 157515.

It is an arithmetic number, because the mean of its divisors is an integer number (21699900).

Almost surely, 2^556111830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 556111830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694396800).

556111830 is an abundant number, since it is smaller than the sum of its proper divisors (832681770).

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

556111830 is a wasteful number, since it uses less digits than its factorization.

556111830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 556111830 is about 23582.0234500774. The cubic root of 556111830 is about 822.3449780670.

It can be divided in two parts, 5561 and 11830, that added together give a triangular number (17391 = T₁₈₆).

The spelling of 556111830 in words is "five hundred fifty-six million, one hundred eleven thousand, eight hundred thirty".