561830500 has 96 divisors (see below), whose sum is σ = 1529918208. Its totient is φ = 175104000.

The previous prime is 561830483. The next prime is 561830537. The reversal of 561830500 is 5038165.

561830500 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 (28).

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, 31204 + ... + 45796.

It is an arithmetic number, because the mean of its divisors is an integer number (15936648).

Almost surely, 2^561830500 is an apocalyptic number.

561830500 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561830500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764959104).

561830500 is an abundant number, since it is smaller than the sum of its proper divisors (968087708).

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

561830500 is a wasteful number, since it uses less digits than its factorization.

561830500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14630 (or 14618 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 561830500 is about 23702.9639496836. The cubic root of 561830500 is about 825.1541799385.

Adding to 561830500 its reverse (5038165), we get a palindrome (566868665).

It can be divided in two parts, 561830 and 500, that added together give a triangular number (562330 = T₁₀₆₀).

The spelling of 561830500 in words is "five hundred sixty-one million, eight hundred thirty thousand, five hundred".