3143440 has 20 divisors (see below), whose sum is σ = 7308684. Its totient is φ = 1257344.

The previous prime is 3143411. The next prime is 3143447. The reversal of 3143440 is 443413.

It can be written as a sum of positive squares in 2 ways, for example, as 2214144 + 929296 = 1488^2 + 964^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (3143447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19567 + ... + 19726.

Almost surely, 2^3143440 is an apocalyptic number.

It is an amenable number.

3143440 is an abundant number, since it is smaller than the sum of its proper divisors (4165244).

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

3143440 is a wasteful number, since it uses less digits than its factorization.

3143440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39306 (or 39300 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 3143440 is about 1772.9749011196. The cubic root of 3143440 is about 146.4878905296.

Adding to 3143440 its reverse (443413), we get a palindrome (3586853).

The spelling of 3143440 in words is "three million, one hundred forty-three thousand, four hundred forty".