1440069139 has 4 divisors (see below), whose sum is σ = 1447608960. Its totient is φ = 1432529320.

The previous prime is 1440069131. The next prime is 1440069157. The reversal of 1440069139 is 9319600441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1440069139 - 2³ = 1440069131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1440069098 and 1440069107.

It is not an unprimeable number, because it can be changed into a prime (1440069131) 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 3 ways as a sum of consecutive naturals, for example, 3769624 + ... + 3770005.

It is an arithmetic number, because the mean of its divisors is an integer number (361902240).

Almost surely, 2^1440069139 is an apocalyptic number.

1440069139 is a deficient number, since it is larger than the sum of its proper divisors (7539821).

1440069139 is an equidigital number, since it uses as much as digits as its factorization.

1440069139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7539820.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 1440069139 is about 37948.2428973991. The cubic root of 1440069139 is about 1129.2613072263.

The spelling of 1440069139 in words is "one billion, four hundred forty million, sixty-nine thousand, one hundred thirty-nine".