561947930 has 16 divisors (see below), whose sum is σ = 1012517280. Its totient is φ = 224554512.

The previous prime is 561947899. The next prime is 561947959. The reversal of 561947930 is 39749165.

561947930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 17384 + ... + 37763.

It is an arithmetic number, because the mean of its divisors is an integer number (63282330).

Almost surely, 2^561947930 is an apocalyptic number.

561947930 is a deficient number, since it is larger than the sum of its proper divisors (450569350).

561947930 is a wasteful number, since it uses less digits than its factorization.

561947930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56173.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 561947930 is about 23705.4409366289. The cubic root of 561947930 is about 825.2116653101.

The spelling of 561947930 in words is "five hundred sixty-one million, nine hundred forty-seven thousand, nine hundred thirty".