2440391866 has 16 divisors (see below), whose sum is σ = 4061054880. Its totient is φ = 1090467280.

The previous prime is 2440391861. The next prime is 2440391867. The reversal of 2440391866 is 6681930442.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2440391861) 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 7 ways as a sum of consecutive naturals, for example, 938761 + ... + 941356.

It is an arithmetic number, because the mean of its divisors is an integer number (253815930).

Almost surely, 2^2440391866 is an apocalyptic number.

2440391866 is a deficient number, since it is larger than the sum of its proper divisors (1620663014).

2440391866 is a wasteful number, since it uses less digits than its factorization.

2440391866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1880189.

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 2440391866 is about 49400.3225293115. The cubic root of 2440391866 is about 1346.3351659143.

The spelling of 2440391866 in words is "two billion, four hundred forty million, three hundred ninety-one thousand, eight hundred sixty-six".