2891267520 has 448 divisors, whose sum is σ = 10369296000. Its totient is φ = 678952960.

The previous prime is 2891267513. The next prime is 2891267521. The reversal of 2891267520 is 257621982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2891267521) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19404406 + ... + 19404554.

It is an arithmetic number, because the mean of its divisors is an integer number (23145750).

Almost surely, 2^2891267520 is an apocalyptic number.

2891267520 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 2891267520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5184648000).

2891267520 is an abundant number, since it is smaller than the sum of its proper divisors (7478028480).

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

2891267520 is a wasteful number, since it uses less digits than its factorization.

2891267520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 2891267520 is about 53770.5079016369. The cubic root of 2891267520 is about 1424.6103409817.

The spelling of 2891267520 in words is "two billion, eight hundred ninety-one million, two hundred sixty-seven thousand, five hundred twenty".