561338860 has 24 divisors (see below), whose sum is σ = 1203894720. Its totient is φ = 219757824.

The previous prime is 561338849. The next prime is 561338863. The reversal of 561338860 is 68833165.

It is not an unprimeable number, because it can be changed into a prime (561338863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297645 + ... + 299524.

It is an arithmetic number, because the mean of its divisors is an integer number (50162280).

Almost surely, 2^561338860 is an apocalyptic number.

It is an amenable number.

561338860 is an abundant number, since it is smaller than the sum of its proper divisors (642555860).

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

561338860 is a wasteful number, since it uses less digits than its factorization.

561338860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597225 (or 597223 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 561338860 is about 23692.5908249816. The cubic root of 561338860 is about 824.9134209725.

The spelling of 561338860 in words is "five hundred sixty-one million, three hundred thirty-eight thousand, eight hundred sixty".