14431440 has 80 divisors (see below), whose sum is σ = 45139968. Its totient is φ = 3813888.

The previous prime is 14431429. The next prime is 14431447. The reversal of 14431440 is 4413441.

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 (14431447) 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 15 ways as a sum of consecutive naturals, for example, 37489 + ... + 37871.

Almost surely, 2^14431440 is an apocalyptic number.

14431440 is a gapful number since it is divisible by the number (10) 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 14431440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22569984).

14431440 is an abundant number, since it is smaller than the sum of its proper divisors (30708528).

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

14431440 is a wasteful number, since it uses less digits than its factorization.

14431440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 14431440 is about 3798.8735172417. The cubic root of 14431440 is about 243.4650107770.

Adding to 14431440 its reverse (4413441), we get a palindrome (18844881).

The spelling of 14431440 in words is "fourteen million, four hundred thirty-one thousand, four hundred forty".