1440000036 has 36 divisors (see below), whose sum is σ = 3708684252. Its totient is φ = 470942784.

The previous prime is 1439999947. The next prime is 1440000043. The reversal of 1440000036 is 6300000441.

It can be written as a sum of positive squares in 2 ways, for example, as 1263375936 + 176624100 = 35544^2 + 13290^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1439999973 and 1440000018.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 375451 + ... + 379266.

It is an arithmetic number, because the mean of its divisors is an integer number (103019007).

Almost surely, 2^1440000036 is an apocalyptic number.

It is an amenable number.

1440000036 is an abundant number, since it is smaller than the sum of its proper divisors (2268684216).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1440000036 is a wasteful number, since it uses less digits than its factorization.

1440000036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754780 (or 754775 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1440000036 is about 37947.3323963622. The cubic root of 1440000036 is about 1129.2432440676.

Adding to 1440000036 its reverse (6300000441), we get a palindrome (7740000477).

The spelling of 1440000036 in words is "one billion, four hundred forty million, thirty-six", and thus it is an aban number.