561445488 has 30 divisors (see below), whose sum is σ = 1571267984. Its totient is φ = 187148448.

The previous prime is 561445487. The next prime is 561445523. The reversal of 561445488 is 884544165.

It is a happy number.

561445488 is a `hidden beast` number, since 5 + 61 + 44 + 548 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561445487) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1949320 + ... + 1949607.

Almost surely, 2^561445488 is an apocalyptic number.

It is an amenable number.

561445488 is an abundant number, since it is smaller than the sum of its proper divisors (1009822496).

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

561445488 is a wasteful number, since it uses less digits than its factorization.

561445488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3898941 (or 3898932 counting only the distinct ones).

The product of its digits is 614400, while the sum is 45.

The square root of 561445488 is about 23694.8409574743. The cubic root of 561445488 is about 824.9656492585.

The spelling of 561445488 in words is "five hundred sixty-one million, four hundred forty-five thousand, four hundred eighty-eight".