80441820 has 144 divisors (see below), whose sum is σ = 263303040. Its totient is φ = 19813248.

The previous prime is 80441819. The next prime is 80441843. The reversal of 80441820 is 2814408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 146787 + ... + 147333.

Almost surely, 2^80441820 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 80441820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131651520).

80441820 is an abundant number, since it is smaller than the sum of its proper divisors (182861220).

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

80441820 is a wasteful number, since it uses less digits than its factorization.

80441820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 80441820 is about 8968.9363917914. The cubic root of 80441820 is about 431.6787091512.

It can be divided in two parts, 804 and 41820, that added together give a palindrome (42624).

The spelling of 80441820 in words is "eighty million, four hundred forty-one thousand, eight hundred twenty".