444020013240 has 64 divisors (see below), whose sum is σ = 1333939082400. Its totient is φ = 118238310912.

The previous prime is 444020013187. The next prime is 444020013251. The reversal of 444020013240 is 42310020444.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 444020013240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2524347 + ... + 2694506.

Almost surely, 2^444020013240 is an apocalyptic number.

444020013240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

444020013240 is an abundant number, since it is smaller than the sum of its proper divisors (889919069160).

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

444020013240 is a wasteful number, since it uses less digits than its factorization.

444020013240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5219576 (or 5219572 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 444020013240 its reverse (42310020444), we get a palindrome (486330033684).

The spelling of 444020013240 in words is "four hundred forty-four billion, twenty million, thirteen thousand, two hundred forty".