561909084 has 96 divisors (see below), whose sum is σ = 1484560896. Its totient is φ = 163918080.

The previous prime is 561909083. The next prime is 561909107. The reversal of 561909084 is 480909165.

561909084 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561909083) 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, 502494 + ... + 503610.

It is an arithmetic number, because the mean of its divisors is an integer number (15464176).

Almost surely, 2^561909084 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 561909084, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742280448).

561909084 is an abundant number, since it is smaller than the sum of its proper divisors (922651812).

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

561909084 is a wasteful number, since it uses less digits than its factorization.

561909084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275 (or 1273 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 561909084 is about 23704.6215747056. The cubic root of 561909084 is about 825.1926499593.

The spelling of 561909084 in words is "five hundred sixty-one million, nine hundred nine thousand, eighty-four".