2991266880 has 448 divisors, whose sum is σ = 11404689408. Its totient is φ = 649912320.

The previous prime is 2991266869. The next prime is 2991266903. The reversal of 2991266880 is 886621992.

It is a tau number, because it is divible by the number of its divisors (448).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17290474 + ... + 17290646.

It is an arithmetic number, because the mean of its divisors is an integer number (25456896).

Almost surely, 2^2991266880 is an apocalyptic number.

2991266880 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 2991266880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5702344704).

2991266880 is an abundant number, since it is smaller than the sum of its proper divisors (8413422528).

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

2991266880 is a wasteful number, since it uses less digits than its factorization.

2991266880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 2991266880 is about 54692.4755336600. The cubic root of 2991266880 is about 1440.8487280611.

The spelling of 2991266880 in words is "two billion, nine hundred ninety-one million, two hundred sixty-six thousand, eight hundred eighty".