1440379899 has 24 divisors (see below), whose sum is σ = 2481153792. Its totient is φ = 787287600.

The previous prime is 1440379883. The next prime is 1440379951. The reversal of 1440379899 is 9989730441.

It is not a de Polignac number, because 1440379899 - 2⁴ = 1440379883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1440379819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 495577 + ... + 498474.

It is an arithmetic number, because the mean of its divisors is an integer number (103381408).

Almost surely, 2^1440379899 is an apocalyptic number.

1440379899 is a deficient number, since it is larger than the sum of its proper divisors (1040773893).

1440379899 is a wasteful number, since it uses less digits than its factorization.

1440379899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994087 (or 994084 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The square root of 1440379899 is about 37952.3372007575. The cubic root of 1440379899 is about 1129.3425311052.

The spelling of 1440379899 in words is "one billion, four hundred forty million, three hundred seventy-nine thousand, eight hundred ninety-nine".