561808332 has 48 divisors (see below), whose sum is σ = 1464141280. Its totient is φ = 186292224.

The previous prime is 561808309. The next prime is 561808339. The reversal of 561808332 is 233808165.

561808332 is a `hidden beast` number, since 5 + 618 + 0 + 8 + 3 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (561808339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7368 + ... + 34320.

Almost surely, 2^561808332 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 561808332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (732070640).

561808332 is an abundant number, since it is smaller than the sum of its proper divisors (902332948).

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

561808332 is a wasteful number, since it uses less digits than its factorization.

561808332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27159 (or 27151 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 561808332 is about 23702.4963242271. The cubic root of 561808332 is about 825.1433271645.

The spelling of 561808332 in words is "five hundred sixty-one million, eight hundred eight thousand, three hundred thirty-two".