1440479985 has 32 divisors (see below), whose sum is σ = 2678676480. Its totient is φ = 647341248.

The previous prime is 1440479969. The next prime is 1440479987. The reversal of 1440479985 is 5899740441.

It is not a de Polignac number, because 1440479985 - 2⁴ = 1440479969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1440479987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 110067 + ... + 122456.

It is an arithmetic number, because the mean of its divisors is an integer number (83708640).

Almost surely, 2^1440479985 is an apocalyptic number.

1440479985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1440479985 is a deficient number, since it is larger than the sum of its proper divisors (1238196495).

1440479985 is a wasteful number, since it uses less digits than its factorization.

1440479985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232597.

The product of its (nonzero) digits is 1451520, while the sum is 51.

The square root of 1440479985 is about 37953.6557527730. The cubic root of 1440479985 is about 1129.3686882689.

The spelling of 1440479985 in words is "one billion, four hundred forty million, four hundred seventy-nine thousand, nine hundred eighty-five".