561403930 has 8 divisors (see below), whose sum is σ = 1010527092. Its totient is φ = 224561568.

The previous prime is 561403883. The next prime is 561403951. The reversal of 561403930 is 39304165.

It can be written as a sum of positive squares in 2 ways, for example, as 523814769 + 37589161 = 22887^2 + 6131^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 561403892 and 561403901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28070187 + ... + 28070206.

Almost surely, 2^561403930 is an apocalyptic number.

561403930 is a deficient number, since it is larger than the sum of its proper divisors (449123162).

561403930 is a wasteful number, since it uses less digits than its factorization.

561403930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56140400.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 561403930 is about 23693.9639992974. The cubic root of 561403930 is about 824.9452941993.

The spelling of 561403930 in words is "five hundred sixty-one million, four hundred three thousand, nine hundred thirty".