561883868 has 24 divisors (see below), whose sum is σ = 1210212192. Its totient is φ = 222283584.

The previous prime is 561883841. The next prime is 561883873. The reversal of 561883868 is 868388165.

It is a super-2 number, since 2×561883868² = 631426962237282848, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 771455 + ... + 772182.

It is an arithmetic number, because the mean of its divisors is an integer number (50425508).

Almost surely, 2^561883868 is an apocalyptic number.

It is an amenable number.

561883868 is an abundant number, since it is smaller than the sum of its proper divisors (648328324).

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

561883868 is a wasteful number, since it uses less digits than its factorization.

561883868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543661 (or 1543659 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 53.

The square root of 561883868 is about 23704.0896893342. The cubic root of 561883868 is about 825.1803061065.

The spelling of 561883868 in words is "five hundred sixty-one million, eight hundred eighty-three thousand, eight hundred sixty-eight".