561430686 has 16 divisors (see below), whose sum is σ = 1123642368. Its totient is φ = 187013400.

The previous prime is 561430679. The next prime is 561430697. The reversal of 561430686 is 686034165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22980 + ... + 40631.

It is an arithmetic number, because the mean of its divisors is an integer number (70227648).

Almost surely, 2^561430686 is an apocalyptic number.

561430686 is an abundant number, since it is smaller than the sum of its proper divisors (562211682).

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

561430686 is a wasteful number, since it uses less digits than its factorization.

561430686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65087.

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 561430686 is about 23694.5286089426. The cubic root of 561430686 is about 824.9583993716.

The spelling of 561430686 in words is "five hundred sixty-one million, four hundred thirty thousand, six hundred eighty-six".