55881444 has 36 divisors (see below), whose sum is σ = 136321136. Its totient is φ = 17815248.

The previous prime is 55881403. The next prime is 55881457. The reversal of 55881444 is 44418855.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1947 + ... + 10749.

Almost surely, 2^55881444 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 55881444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68160568).

55881444 is an abundant number, since it is smaller than the sum of its proper divisors (80439692).

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

55881444 is a wasteful number, since it uses less digits than its factorization.

55881444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8856 (or 8831 counting only the distinct ones).

The product of its digits is 102400, while the sum is 39.

The square root of 55881444 is about 7475.3892206359. The cubic root of 55881444 is about 382.3160583390.

The spelling of 55881444 in words is "fifty-five million, eight hundred eighty-one thousand, four hundred forty-four".