3181618040 has 64 divisors (see below), whose sum is σ = 7569918720. Its totient is φ = 1201536000.

The previous prime is 3181618021. The next prime is 3181618061. The reversal of 3181618040 is 408161813.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3181617988 and 3181618006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19550 + ... + 82130.

It is an arithmetic number, because the mean of its divisors is an integer number (118279980).

Almost surely, 2^3181618040 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 3181618040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3784959360).

3181618040 is an abundant number, since it is smaller than the sum of its proper divisors (4388300680).

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

3181618040 is a wasteful number, since it uses less digits than its factorization.

3181618040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62664 (or 62660 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 3181618040 is about 56405.8333862731. The cubic root of 3181618040 is about 1470.7855242926.

Adding to 3181618040 its reverse (408161813), we get a palindrome (3589779853).

The spelling of 3181618040 in words is "three billion, one hundred eighty-one million, six hundred eighteen thousand, forty".