1440440004 has 24 divisors (see below), whose sum is σ = 3367012320. Its totient is φ = 479291584.

The previous prime is 1440439997. The next prime is 1440440011. The reversal of 1440440004 is 4000440441.

It is an interprime number because it is at equal distance from previous prime (1440439997) and next prime (1440440011).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99849 + ... + 113360.

It is an arithmetic number, because the mean of its divisors is an integer number (140292180).

Almost surely, 2^1440440004 is an apocalyptic number.

It is an amenable number.

1440440004 is an abundant number, since it is smaller than the sum of its proper divisors (1926572316).

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

1440440004 is a wasteful number, since it uses less digits than its factorization.

1440440004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213779 (or 213777 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 1440440004 is about 37953.1290409631. The cubic root of 1440440004 is about 1129.3582395047.

Adding to 1440440004 its reverse (4000440441), we get a palindrome (5440880445).

The spelling of 1440440004 in words is "one billion, four hundred forty million, four hundred forty thousand, four".