55441428 has 48 divisors (see below), whose sum is σ = 150065664. Its totient is φ = 15602400.

The previous prime is 55441391. The next prime is 55441439. The reversal of 55441428 is 82414455.

It is a happy number.

55441428 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 an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 703 + ... + 10553.

It is an arithmetic number, because the mean of its divisors is an integer number (3126368).

Almost surely, 2^55441428 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 55441428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75032832).

55441428 is an abundant number, since it is smaller than the sum of its proper divisors (94624236).

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

55441428 is a wasteful number, since it uses less digits than its factorization.

55441428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9932 (or 9930 counting only the distinct ones).

The product of its digits is 25600, while the sum is 33.

The square root of 55441428 is about 7445.9000799097. The cubic root of 55441428 is about 381.3099481831.

The spelling of 55441428 in words is "fifty-five million, four hundred forty-one thousand, four hundred twenty-eight".