561328044 has 12 divisors (see below), whose sum is σ = 1309765464. Its totient is φ = 187109344.

The previous prime is 561328043. The next prime is 561328051. The reversal of 561328044 is 440823165.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 561327996 and 561328014.

It is not an unprimeable number, because it can be changed into a prime (561328043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23388657 + ... + 23388680.

It is an arithmetic number, because the mean of its divisors is an integer number (109147122).

Almost surely, 2^561328044 is an apocalyptic number.

It is an amenable number.

561328044 is an abundant number, since it is smaller than the sum of its proper divisors (748437420).

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

561328044 is a wasteful number, since it uses less digits than its factorization.

561328044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46777344 (or 46777342 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 561328044 is about 23692.3625668695. The cubic root of 561328044 is about 824.9081227344.

The spelling of 561328044 in words is "five hundred sixty-one million, three hundred twenty-eight thousand, forty-four".