240347891 has 12 divisors (see below), whose sum is σ = 294304680. Its totient is φ = 195168960.

The previous prime is 240347879. The next prime is 240347923. The reversal of 240347891 is 198743042.

It is a de Polignac number, because none of the positive numbers 2^k-240347891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (240047891) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 128150 + ... + 130011.

It is an arithmetic number, because the mean of its divisors is an integer number (24525390).

Almost surely, 2^240347891 is an apocalyptic number.

240347891 is a deficient number, since it is larger than the sum of its proper divisors (53956789).

240347891 is a wasteful number, since it uses less digits than its factorization.

240347891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258194 (or 258187 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 240347891 is about 15503.1574525966. The cubic root of 240347891 is about 621.7466279504.

The spelling of 240347891 in words is "two hundred forty million, three hundred forty-seven thousand, eight hundred ninety-one".