4531440 has 80 divisors (see below), whose sum is σ = 14284800. Its totient is φ = 1188096.

The previous prime is 4531409. The next prime is 4531441. The reversal of 4531440 is 441354.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4531441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18841 + ... + 19079.

It is an arithmetic number, because the mean of its divisors is an integer number (178560).

Almost surely, 2^4531440 is an apocalyptic number.

4531440 is a gapful number since it is divisible by the number (40) 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 4531440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7142400).

4531440 is an abundant number, since it is smaller than the sum of its proper divisors (9753360).

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

4531440 is a wasteful number, since it uses less digits than its factorization.

4531440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 4531440 is about 2128.7179240097. The cubic root of 4531440 is about 165.4799615513.

Adding to 4531440 its reverse (441354), we get a palindrome (4972794).

It can be divided in two parts, 45314 and 40, that added together give a palindrome (45354).

The spelling of 4531440 in words is "four million, five hundred thirty-one thousand, four hundred forty".