4320144 has 60 divisors (see below), whose sum is σ = 12734800. Its totient is φ = 1363392.

The previous prime is 4320119. The next prime is 4320187. The reversal of 4320144 is 4410234.

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 11 ways as a sum of consecutive naturals, for example, 1947 + ... + 3525.

Almost surely, 2^4320144 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 4320144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6367400).

4320144 is an abundant number, since it is smaller than the sum of its proper divisors (8414656).

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

4320144 is a wasteful number, since it uses less digits than its factorization.

4320144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612 (or 1603 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 4320144 is about 2078.4956098101. The cubic root of 4320144 is about 162.8668665873.

Adding to 4320144 its reverse (4410234), we get a palindrome (8730378).

The spelling of 4320144 in words is "four million, three hundred twenty thousand, one hundred forty-four".