561740892 has 12 divisors (see below), whose sum is σ = 1310728776. Its totient is φ = 187246960.

The previous prime is 561740873. The next prime is 561740897. The reversal of 561740892 is 298047165.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561740897) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 23405859 + ... + 23405882.

It is an arithmetic number, because the mean of its divisors is an integer number (109227398).

Almost surely, 2^561740892 is an apocalyptic number.

It is an amenable number.

561740892 is an abundant number, since it is smaller than the sum of its proper divisors (748987884).

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

561740892 is a wasteful number, since it uses less digits than its factorization.

561740892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46811748 (or 46811746 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 561740892 is about 23701.0736465672. The cubic root of 561740892 is about 825.1103088498.

The spelling of 561740892 in words is "five hundred sixty-one million, seven hundred forty thousand, eight hundred ninety-two".