2971216728 has 80 divisors (see below), whose sum is σ = 8684034480. Its totient is φ = 947339712.

The previous prime is 2971216723. The next prime is 2971216753. The reversal of 2971216728 is 8276121792.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2971216723) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 84775 + ... + 114582.

It is an arithmetic number, because the mean of its divisors is an integer number (108550431).

Almost surely, 2^2971216728 is an apocalyptic number.

It is an amenable number.

2971216728 is an abundant number, since it is smaller than the sum of its proper divisors (5712817752).

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

2971216728 is a wasteful number, since it uses less digits than its factorization.

2971216728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199398 (or 199385 counting only the distinct ones).

The product of its digits is 169344, while the sum is 45.

The square root of 2971216728 is about 54508.8683426835. The cubic root of 2971216728 is about 1437.6222217239.

The spelling of 2971216728 in words is "two billion, nine hundred seventy-one million, two hundred sixteen thousand, seven hundred twenty-eight".