5561840 has 40 divisors (see below), whose sum is σ = 13287840. Its totient is φ = 2163456.

The previous prime is 5561821. The next prime is 5561849. The reversal of 5561840 is 481655.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5561849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2021 + ... + 3899.

It is an arithmetic number, because the mean of its divisors is an integer number (332196).

Almost surely, 2^5561840 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 5561840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6643920).

5561840 is an abundant number, since it is smaller than the sum of its proper divisors (7726000).

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

5561840 is a wasteful number, since it uses less digits than its factorization.

5561840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1929 (or 1923 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 5561840 is about 2358.3553591433. The cubic root of 5561840 is about 177.1765185523.

The spelling of 5561840 in words is "five million, five hundred sixty-one thousand, eight hundred forty".