844044444040 has 64 divisors (see below), whose sum is σ = 2176840598400. Its totient is φ = 288527920128.

The previous prime is 844044443987. The next prime is 844044444053. The reversal of 844044444040 is 40444440448.

It is a happy number.

It is a super-2 number, since 2×844044444040² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 844044443984 and 844044444002.

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, 4378110 + ... + 4566829.

It is an arithmetic number, because the mean of its divisors is an integer number (34013134350).

Almost surely, 2^844044444040 is an apocalyptic number.

It is an amenable number.

844044444040 is an abundant number, since it is smaller than the sum of its proper divisors (1332796154360).

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

844044444040 is a wasteful number, since it uses less digits than its factorization.

844044444040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8945294 (or 8945290 counting only the distinct ones).

The product of its (nonzero) digits is 524288, while the sum is 40.

Adding to 844044444040 its reverse (40444440448), we get a palindrome (884488884488).

The spelling of 844044444040 in words is "eight hundred forty-four billion, forty-four million, four hundred forty-four thousand, forty".