14431640 has 64 divisors (see below), whose sum is σ = 36223200. Its totient is φ = 5142528.

The previous prime is 14431633. The next prime is 14431643. The reversal of 14431640 is 4613441.

14431640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14431643) 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, 12362 + ... + 13478.

Almost surely, 2^14431640 is an apocalyptic number.

14431640 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 14431640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18111600).

14431640 is an abundant number, since it is smaller than the sum of its proper divisors (21791560).

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

14431640 is a wasteful number, since it uses less digits than its factorization.

14431640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164 (or 1160 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 14431640 is about 3798.8998407434. The cubic root of 14431640 is about 243.4661354691.

The spelling of 14431640 in words is "fourteen million, four hundred thirty-one thousand, six hundred forty".