561630404 has 24 divisors (see below), whose sum is σ = 991985400. Its totient is φ = 278214656.

The previous prime is 561630389. The next prime is 561630409. The reversal of 561630404 is 404036165.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 365574400 + 196056004 = 19120^2 + 14002^2 .

It is not an unprimeable number, because it can be changed into a prime (561630409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534872 + ... + 535920.

It is an arithmetic number, because the mean of its divisors is an integer number (41332725).

Almost surely, 2^561630404 is an apocalyptic number.

It is an amenable number.

561630404 is a deficient number, since it is larger than the sum of its proper divisors (430354996).

561630404 is a wasteful number, since it uses less digits than its factorization.

561630404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2167 (or 2165 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 561630404 is about 23698.7426670699. The cubic root of 561630404 is about 825.0562087201.

Adding to 561630404 its reverse (404036165), we get a palindrome (965666569).

The spelling of 561630404 in words is "five hundred sixty-one million, six hundred thirty thousand, four hundred four".