2291126920 has 64 divisors (see below), whose sum is σ = 5329981440. Its totient is φ = 885446400.

The previous prime is 2291126897. The next prime is 2291126947. The reversal of 2291126920 is 296211922.

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, 1069050 + ... + 1071190.

It is an arithmetic number, because the mean of its divisors is an integer number (83280960).

Almost surely, 2^2291126920 is an apocalyptic number.

2291126920 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 2291126920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2664990720).

2291126920 is an abundant number, since it is smaller than the sum of its proper divisors (3038854520).

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

2291126920 is a wasteful number, since it uses less digits than its factorization.

2291126920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3046 (or 3042 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 2291126920 is about 47865.7175857628. The cubic root of 2291126920 is about 1318.3064675871.

The spelling of 2291126920 in words is "two billion, two hundred ninety-one million, one hundred twenty-six thousand, nine hundred twenty".