55440200 has 48 divisors (see below), whose sum is σ = 132061860. Its totient is φ = 21632000.

The previous prime is 55440197. The next prime is 55440211. The reversal of 55440200 is 204455.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 13734436 + 41705764 = 3706^2 + 6458^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 4820 + ... + 11580.

Almost surely, 2^55440200 is an apocalyptic number.

55440200 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 55440200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66030930).

55440200 is an abundant number, since it is smaller than the sum of its proper divisors (76621660).

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

55440200 is a wasteful number, since it uses less digits than its factorization.

55440200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6818 (or 6809 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 55440200 is about 7445.8176179651. The cubic root of 55440200 is about 381.3071328873.

Adding to 55440200 its reverse (204455), we get a palindrome (55644655).

The spelling of 55440200 in words is "fifty-five million, four hundred forty thousand, two hundred".