4320440 has 16 divisors (see below), whose sum is σ = 9721080. Its totient is φ = 1728160.

The previous prime is 4320419. The next prime is 4320443. The reversal of 4320440 is 440234.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4320443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53966 + ... + 54045.

Almost surely, 2^4320440 is an apocalyptic number.

4320440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4320440 is an abundant number, since it is smaller than the sum of its proper divisors (5400640).

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

4320440 is a wasteful number, since it uses less digits than its factorization.

4320440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108022 (or 108018 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 4320440 is about 2078.5668139369. The cubic root of 4320440 is about 162.8705861772.

Adding to 4320440 its reverse (440234), we get a palindrome (4760674).

The spelling of 4320440 in words is "four million, three hundred twenty thousand, four hundred forty".