2931940872 has 144 divisors (see below), whose sum is σ = 9270621360. Its totient is φ = 834660288.

The previous prime is 2931940871. The next prime is 2931940883. The reversal of 2931940872 is 2780491392.

It is not an unprimeable number, because it can be changed into a prime (2931940871) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1081743 + ... + 1084449.

It is an arithmetic number, because the mean of its divisors is an integer number (64379315).

Almost surely, 2^2931940872 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 2931940872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4635310680).

2931940872 is an abundant number, since it is smaller than the sum of its proper divisors (6338680488).

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

2931940872 is a wasteful number, since it uses less digits than its factorization.

2931940872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3040 (or 3026 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 2931940872 is about 54147.3994943432. The cubic root of 2931940872 is about 1431.2595667076.

The spelling of 2931940872 in words is "two billion, nine hundred thirty-one million, nine hundred forty thousand, eight hundred seventy-two".