3131440004 has 48 divisors (see below), whose sum is σ = 6845225856. Its totient is φ = 1217721600.

The previous prime is 3131439977. The next prime is 3131440009. The reversal of 3131440004 is 4000441313.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (3131440009) 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, 157232 + ... + 176024.

It is an arithmetic number, because the mean of its divisors is an integer number (142608872).

Almost surely, 2^3131440004 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3131440004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3422612928).

3131440004 is an abundant number, since it is smaller than the sum of its proper divisors (3713785852).

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

3131440004 is a wasteful number, since it uses less digits than its factorization.

3131440004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19356 (or 19354 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 3131440004 is about 55959.2709387819. The cubic root of 3131440004 is about 1463.0124832550.

Adding to 3131440004 its reverse (4000441313), we get a palindrome (7131881317).

The spelling of 3131440004 in words is "three billion, one hundred thirty-one million, four hundred forty thousand, four".