3181313940 has 96 divisors (see below), whose sum is σ = 10191304704. Its totient is φ = 726364800.

The previous prime is 3181313917. The next prime is 3181313959. The reversal of 3181313940 is 493131813.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 437817 + ... + 445023.

It is an arithmetic number, because the mean of its divisors is an integer number (106159424).

Almost surely, 2^3181313940 is an apocalyptic number.

3181313940 is a gapful number since it is divisible by the number (30) 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 3181313940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5095652352).

3181313940 is an abundant number, since it is smaller than the sum of its proper divisors (7009990764).

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

3181313940 is a wasteful number, since it uses less digits than its factorization.

3181313940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8277 (or 8275 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 3181313940 is about 56403.1376786788. The cubic root of 3181313940 is about 1470.7386634268.

It can be divided in two parts, 31813 and 13940, that added together give a triangular number (45753 = T₃₀₂).

The spelling of 3181313940 in words is "three billion, one hundred eighty-one million, three hundred thirteen thousand, nine hundred forty".