1440034668 has 18 divisors (see below), whose sum is σ = 3640087724. Its totient is φ = 480011544.

The previous prime is 1440034667. The next prime is 1440034679. The reversal of 1440034668 is 8664300441.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 40000963 = 1440034668 / (1 + 4 + 4 + 0 + 0 + 3 + 4 + 6 + 6 + 8).

It is not an unprimeable number, because it can be changed into a prime (1440034663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20000446 + ... + 20000517.

Almost surely, 2^1440034668 is an apocalyptic number.

1440034668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1440034668 is an abundant number, since it is smaller than the sum of its proper divisors (2200053056).

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

1440034668 is a wasteful number, since it uses less digits than its factorization.

1440034668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40000973 (or 40000968 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 36.

The square root of 1440034668 is about 37947.7887102793. The cubic root of 1440034668 is about 1129.2522967615.

The spelling of 1440034668 in words is "one billion, four hundred forty million, thirty-four thousand, six hundred sixty-eight".