561404472 has 128 divisors (see below), whose sum is σ = 1499904000. Its totient is φ = 174873600.

The previous prime is 561404429. The next prime is 561404477. The reversal of 561404472 is 274404165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561404477) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2821029 + ... + 2821227.

It is an arithmetic number, because the mean of its divisors is an integer number (11718000).

Almost surely, 2^561404472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561404472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (749952000).

561404472 is an abundant number, since it is smaller than the sum of its proper divisors (938499528).

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

561404472 is a wasteful number, since it uses less digits than its factorization.

561404472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 561404472 is about 23693.9754368067. The cubic root of 561404472 is about 824.9455596767.

The spelling of 561404472 in words is "five hundred sixty-one million, four hundred four thousand, four hundred seventy-two".