80443818 has 96 divisors (see below), whose sum is σ = 218015616. Its totient is φ = 20870784.

The previous prime is 80443799. The next prime is 80443819. The reversal of 80443818 is 81834408.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80443819) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 109380 + ... + 110112.

It is an arithmetic number, because the mean of its divisors is an integer number (2270996).

Almost surely, 2^80443818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80443818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109007808).

80443818 is an abundant number, since it is smaller than the sum of its proper divisors (137571798).

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

80443818 is a wasteful number, since it uses less digits than its factorization.

80443818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 828 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 80443818 is about 8969.0477755445. The cubic root of 80443818 is about 431.6822831087.

The spelling of 80443818 in words is "eighty million, four hundred forty-three thousand, eight hundred eighteen".