1440019994 has 16 divisors (see below), whose sum is σ = 2598532800. Its totient is φ = 584669664.

The previous prime is 1440019993. The next prime is 1440020009. The reversal of 1440019994 is 4999100441.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1440019993) 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, 2706539 + ... + 2707070.

It is an arithmetic number, because the mean of its divisors is an integer number (162408300).

Almost surely, 2^1440019994 is an apocalyptic number.

1440019994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1440019994 is a deficient number, since it is larger than the sum of its proper divisors (1158512806).

1440019994 is a wasteful number, since it uses less digits than its factorization.

1440019994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5413637.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 1440019994 is about 37947.5953651875. The cubic root of 1440019994 is about 1129.2484610426.

The spelling of 1440019994 in words is "one billion, four hundred forty million, nineteen thousand, nine hundred ninety-four".