561576438 has 24 divisors (see below), whose sum is σ = 1217221200. Its totient is φ = 187119504.

The previous prime is 561576413. The next prime is 561576461. The reversal of 561576438 is 834675165.

561576438 is a `hidden beast` number, since 561 + 57 + 6 + 4 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 561576393 and 561576402.

It is a congruent number.

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, 62748 + ... + 71136.

It is an arithmetic number, because the mean of its divisors is an integer number (50717550).

Almost surely, 2^561576438 is an apocalyptic number.

561576438 is an abundant number, since it is smaller than the sum of its proper divisors (655644762).

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

561576438 is a wasteful number, since it uses less digits than its factorization.

561576438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12116 (or 12113 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 561576438 is about 23697.6040561066. The cubic root of 561576438 is about 825.0297818450.

The spelling of 561576438 in words is "five hundred sixty-one million, five hundred seventy-six thousand, four hundred thirty-eight".