561435800 has 24 divisors (see below), whose sum is σ = 1305338700. Its totient is φ = 224574240.

The previous prime is 561435781. The next prime is 561435803. The reversal of 561435800 is 8534165.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561435803) 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, 1403390 + ... + 1403789.

Almost surely, 2^561435800 is an apocalyptic number.

561435800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

561435800 is an abundant number, since it is smaller than the sum of its proper divisors (743902900).

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

561435800 is a wasteful number, since it uses less digits than its factorization.

561435800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2807195 (or 2807186 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 561435800 is about 23694.6365239056. The cubic root of 561435800 is about 824.9609041773.

Adding to 561435800 its reverse (8534165), we get a palindrome (569969965).

It can be divided in two parts, 5614 and 35800, that added together give a palindrome (41414).

The spelling of 561435800 in words is "five hundred sixty-one million, four hundred thirty-five thousand, eight hundred".