14142440 has 32 divisors (see below), whose sum is σ = 34269480. Its totient is φ = 5221632.

The previous prime is 14142439. The next prime is 14142451. The reversal of 14142440 is 4424141.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9205156 + 4937284 = 3034^2 + 2222^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13079 + ... + 14118.

Almost surely, 2^14142440 is an apocalyptic number.

14142440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14142440 is an abundant number, since it is smaller than the sum of its proper divisors (20127040).

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

14142440 is a wasteful number, since it uses less digits than its factorization.

14142440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27221 (or 27217 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 14142440 is about 3760.6435619452. The cubic root of 14142440 is about 241.8288524201.

Adding to 14142440 its reverse (4424141), we get a palindrome (18566581).

The spelling of 14142440 in words is "fourteen million, one hundred forty-two thousand, four hundred forty".