5445440 has 224 divisors, whose sum is σ = 18434304. Its totient is φ = 1474560.

The previous prime is 5445439. The next prime is 5445449. The reversal of 5445440 is 445445.

It is a tau number, because it is divible by the number of its divisors (224).

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5445449) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 320312 + ... + 320328.

It is an arithmetic number, because the mean of its divisors is an integer number (82296).

Almost surely, 2^5445440 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 5445440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9217152).

5445440 is an abundant number, since it is smaller than the sum of its proper divisors (12988864).

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

5445440 is a wasteful number, since it uses less digits than its factorization.

5445440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65 (or 55 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 5445440 is about 2333.5466569152. The cubic root of 5445440 is about 175.9317917513.

It can be divided in two parts, 5445 and 440, that added together give a palindrome (5885).

The spelling of 5445440 in words is "five million, four hundred forty-five thousand, four hundred forty".