80444040 has 64 divisors (see below), whose sum is σ = 243855360. Its totient is φ = 21227520.

The previous prime is 80443997. The next prime is 80444047. The reversal of 80444040 is 4044408.

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 80444040.

It is not an unprimeable number, because it can be changed into a prime (80444047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8185 + ... + 15095.

It is an arithmetic number, because the mean of its divisors is an integer number (3810240).

Almost surely, 2^80444040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80444040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121927680).

80444040 is an abundant number, since it is smaller than the sum of its proper divisors (163411320).

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

80444040 is a wasteful number, since it uses less digits than its factorization.

80444040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7022 (or 7018 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 24.

The square root of 80444040 is about 8969.0601514317. The cubic root of 80444040 is about 431.6826802114.

Adding to 80444040 its reverse (4044408), we get a palindrome (84488448).

It can be divided in two parts, 804 and 44040, that added together give a palindrome (44844).

The spelling of 80444040 in words is "eighty million, four hundred forty-four thousand, forty".