1440213999 has 16 divisors (see below), whose sum is σ = 2217239808. Its totient is φ = 814493952.

The previous prime is 1440213989. The next prime is 1440214001. The reversal of 1440213999 is 9993120441.

It is not a de Polignac number, because 1440213999 - 2⁸ = 1440213743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1440213999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1440213959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 351477 + ... + 355550.

It is an arithmetic number, because the mean of its divisors is an integer number (138577488).

Almost surely, 2^1440213999 is an apocalyptic number.

1440213999 is a deficient number, since it is larger than the sum of its proper divisors (777025809).

1440213999 is an equidigital number, since it uses as much as digits as its factorization.

1440213999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707134.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 1440213999 is about 37950.1515016739. The cubic root of 1440213999 is about 1129.2991709890.

The spelling of 1440213999 in words is "one billion, four hundred forty million, two hundred thirteen thousand, nine hundred ninety-nine".