2791808240 has 40 divisors (see below), whose sum is σ = 6990260928. Its totient is φ = 1030821120.

The previous prime is 2791808237. The next prime is 2791808267. The reversal of 2791808240 is 428081972.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341176 + ... + 1343255.

Almost surely, 2^2791808240 is an apocalyptic number.

2791808240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2791808240 is an abundant number, since it is smaller than the sum of its proper divisors (4198452688).

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

2791808240 is a wasteful number, since it uses less digits than its factorization.

2791808240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2684457 (or 2684451 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 2791808240 is about 52837.5646675734. The cubic root of 2791808240 is about 1408.0838852183.

The spelling of 2791808240 in words is "two billion, seven hundred ninety-one million, eight hundred eight thousand, two hundred forty".