2491224440 has 32 divisors (see below), whose sum is σ = 5646181680. Its totient is φ = 989213952.

The previous prime is 2491224427. The next prime is 2491224443. The reversal of 2491224440 is 444221942.

It is a junction number, because it is equal to n+sod(n) for n = 2491224397 and 2491224406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491224443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221822 + ... + 232781.

Almost surely, 2^2491224440 is an apocalyptic number.

2491224440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2491224440 is an abundant number, since it is smaller than the sum of its proper divisors (3154957240).

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

2491224440 is a wasteful number, since it uses less digits than its factorization.

2491224440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454751 (or 454747 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 2491224440 is about 49912.1672540875. The cubic root of 2491224440 is about 1355.6189109011.

The spelling of 2491224440 in words is "two billion, four hundred ninety-one million, two hundred twenty-four thousand, four hundred forty".