5581944 has 24 divisors (see below), whose sum is σ = 15117960. Its totient is φ = 1860624.

The previous prime is 5581937. The next prime is 5581963. The reversal of 5581944 is 4491855.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 5581899 and 5581908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38692 + ... + 38835.

It is an arithmetic number, because the mean of its divisors is an integer number (629915).

Almost surely, 2^5581944 is an apocalyptic number.

It is an amenable number.

5581944 is an abundant number, since it is smaller than the sum of its proper divisors (9536016).

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

5581944 is a wasteful number, since it uses less digits than its factorization.

5581944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77539 (or 77532 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 5581944 is about 2362.6138067826. The cubic root of 5581944 is about 177.3897377751.

The spelling of 5581944 in words is "five million, five hundred eighty-one thousand, nine hundred forty-four".