4309440 has 84 divisors (see below), whose sum is σ = 13889736. Its totient is φ = 1132032.

The previous prime is 4309433. The next prime is 4309451. The reversal of 4309440 is 449034.

It is a super-2 number, since 2×4309440² = 37142546227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 4309440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64287 + ... + 64353.

It is an arithmetic number, because the mean of its divisors is an integer number (165354).

Almost surely, 2^4309440 is an apocalyptic number.

4309440 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 4309440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6944868).

4309440 is an abundant number, since it is smaller than the sum of its proper divisors (9580296).

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

4309440 is an equidigital number, since it uses as much as digits as its factorization.

4309440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 4309440 is about 2075.9190735672. The cubic root of 4309440 is about 162.7322438575.

It can be divided in two parts, 43094 and 40, that added together give a palindrome (43134).

The spelling of 4309440 in words is "four million, three hundred nine thousand, four hundred forty".