80440444 has 48 divisors (see below), whose sum is σ = 167118336. Its totient is φ = 33163200.

The previous prime is 80440441. The next prime is 80440457. The reversal of 80440444 is 44404408.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80440441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85014 + ... + 85954.

It is an arithmetic number, because the mean of its divisors is an integer number (3481632).

Almost surely, 2^80440444 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 80440444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83559168).

80440444 is an abundant number, since it is smaller than the sum of its proper divisors (86677892).

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

80440444 is a wasteful number, since it uses less digits than its factorization.

80440444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 28.

The square root of 80440444 is about 8968.8596822562. The cubic root of 80440444 is about 431.6762477728.

The spelling of 80440444 in words is "eighty million, four hundred forty thousand, four hundred forty-four".