1440692089 has 4 divisors (see below), whose sum is σ = 1462195024. Its totient is φ = 1419189156.

The previous prime is 1440692087. The next prime is 1440692093. The reversal of 1440692089 is 9802960441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1440692089 - 2¹ = 1440692087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1440692087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10751367 + ... + 10751500.

It is an arithmetic number, because the mean of its divisors is an integer number (365548756).

Almost surely, 2^1440692089 is an apocalyptic number.

It is an amenable number.

1440692089 is a deficient number, since it is larger than the sum of its proper divisors (21502935).

1440692089 is an equidigital number, since it uses as much as digits as its factorization.

1440692089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21502934.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 1440692089 is about 37956.4498998523. The cubic root of 1440692089 is about 1129.4241169831.

The spelling of 1440692089 in words is "one billion, four hundred forty million, six hundred ninety-two thousand, eighty-nine".