55044000 has 288 divisors, whose sum is σ = 214643520. Its totient is φ = 13248000.

The previous prime is 55043993. The next prime is 55044029. The reversal of 55044000 is 44055.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 395931 + ... + 396069.

It is an arithmetic number, because the mean of its divisors is an integer number (745290).

Almost surely, 2^55044000 is an apocalyptic number.

55044000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55044000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107321760).

55044000 is an abundant number, since it is smaller than the sum of its proper divisors (159599520).

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

55044000 is a wasteful number, since it uses less digits than its factorization.

55044000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181 (or 160 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 55044000 is about 7419.1643734318. The cubic root of 55044000 is about 380.3966311106.

Adding to 55044000 its reverse (44055), we get a palindrome (55088055).

Subtracting from 55044000 its reverse (44055), we obtain a palindrome (54999945).

The spelling of 55044000 in words is "fifty-five million, forty-four thousand".