1440344028 has 12 divisors (see below), whose sum is σ = 3360802760. Its totient is φ = 480114672.

The previous prime is 1440343997. The next prime is 1440344033. The reversal of 1440344028 is 8204430441.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1440343986 and 1440344004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60014323 + ... + 60014346.

Almost surely, 2^1440344028 is an apocalyptic number.

It is an amenable number.

1440344028 is an abundant number, since it is smaller than the sum of its proper divisors (1920458732).

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

1440344028 is a wasteful number, since it uses less digits than its factorization.

1440344028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120028676 (or 120028674 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 1440344028 is about 37951.8646182240. The cubic root of 1440344028 is about 1129.3331560363. Note that the first 3 decimals are identical.

Adding to 1440344028 its reverse (8204430441), we get a palindrome (9644774469).

The spelling of 1440344028 in words is "one billion, four hundred forty million, three hundred forty-four thousand, twenty-eight".