2891731120 has 80 divisors (see below), whose sum is σ = 7034139072. Its totient is φ = 1103477760.

The previous prime is 2891731111. The next prime is 2891731147. The reversal of 2891731120 is 211371982.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772774 + ... + 776506.

Almost surely, 2^2891731120 is an apocalyptic number.

2891731120 is a gapful number since it is divisible by the number (20) 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 2891731120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3517069536).

2891731120 is an abundant number, since it is smaller than the sum of its proper divisors (4142407952).

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

2891731120 is a wasteful number, since it uses less digits than its factorization.

2891731120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4190 (or 4184 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 2891731120 is about 53774.8186421860. The cubic root of 2891731120 is about 1424.6864799131.

The spelling of 2891731120 in words is "two billion, eight hundred ninety-one million, seven hundred thirty-one thousand, one hundred twenty".