2291987244 has 24 divisors (see below), whose sum is σ = 5356915200. Its totient is φ = 762717904.

The previous prime is 2291987197. The next prime is 2291987261. The reversal of 2291987244 is 4427891922.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2291987193 and 2291987202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152244 + ... + 166619.

It is an arithmetic number, because the mean of its divisors is an integer number (223204800).

Almost surely, 2^2291987244 is an apocalyptic number.

It is an amenable number.

2291987244 is an abundant number, since it is smaller than the sum of its proper divisors (3064927956).

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

2291987244 is a wasteful number, since it uses less digits than its factorization.

2291987244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319469 (or 319467 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 2291987244 is about 47874.7035917717. The cubic root of 2291987244 is about 1318.4714560842.

The spelling of 2291987244 in words is "two billion, two hundred ninety-one million, nine hundred eighty-seven thousand, two hundred forty-four".