2240409891 has 24 divisors (see below), whose sum is σ = 3089395024. Its totient is φ = 1443810240.

The previous prime is 2240409887. The next prime is 2240409907. The reversal of 2240409891 is 1989040422.

It is not a de Polignac number, because 2240409891 - 2² = 2240409887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2240409811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 635265 + ... + 638781.

Almost surely, 2^2240409891 is an apocalyptic number.

2240409891 is a deficient number, since it is larger than the sum of its proper divisors (848985133).

2240409891 is an equidigital number, since it uses as much as digits as its factorization.

2240409891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3699 (or 3640 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 2240409891 is about 47332.9683307523. The cubic root of 2240409891 is about 1308.5063275794.

The spelling of 2240409891 in words is "two billion, two hundred forty million, four hundred nine thousand, eight hundred ninety-one".