2931780680 has 32 divisors (see below), whose sum is σ = 6614913600. Its totient is φ = 1169439936.

The previous prime is 2931780673. The next prime is 2931780703. The reversal of 2931780680 is 860871392.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87722 + ... + 116441.

It is an arithmetic number, because the mean of its divisors is an integer number (206716050).

Almost surely, 2^2931780680 is an apocalyptic number.

2931780680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2931780680 is an abundant number, since it is smaller than the sum of its proper divisors (3683132920).

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

2931780680 is a wasteful number, since it uses less digits than its factorization.

2931780680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204533 (or 204529 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 2931780680 is about 54145.9202525915. The cubic root of 2931780680 is about 1431.2334997303.

The spelling of 2931780680 in words is "two billion, nine hundred thirty-one million, seven hundred eighty thousand, six hundred eighty".