561894930 has 24 divisors (see below), whose sum is σ = 1460927052. Its totient is φ = 149838624.

The previous prime is 561894929. The next prime is 561894941. The reversal of 561894930 is 39498165.

It is a happy number.

561894930 is a `hidden beast` number, since 561 + 89 + 4 + 9 + 3 + 0 = 666.

561894930 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 558424161 + 3470769 = 23631^2 + 1863^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3121549 + ... + 3121728.

Almost surely, 2^561894930 is an apocalyptic number.

561894930 is an abundant number, since it is smaller than the sum of its proper divisors (899032122).

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

561894930 is a wasteful number, since it uses less digits than its factorization.

561894930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6243290 (or 6243287 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 561894930 is about 23704.3230234487. The cubic root of 561894930 is about 825.1857212733.

The spelling of 561894930 in words is "five hundred sixty-one million, eight hundred ninety-four thousand, nine hundred thirty".