80431820 has 48 divisors (see below), whose sum is σ = 194073600. Its totient is φ = 27428544.

The previous prime is 80431789. The next prime is 80431829. The reversal of 80431820 is 2813408.

It is a self number, because there is not a number n which added to its sum of digits gives 80431820.

It is not an unprimeable number, because it can be changed into a prime (80431829) 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, 26417 + ... + 29303.

It is an arithmetic number, because the mean of its divisors is an integer number (4043200).

Almost surely, 2^80431820 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 80431820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97036800).

80431820 is an abundant number, since it is smaller than the sum of its proper divisors (113641780).

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

80431820 is a wasteful number, since it uses less digits than its factorization.

80431820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102 (or 3100 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 80431820 is about 8968.3788947613. The cubic root of 80431820 is about 431.6608205871.

The spelling of 80431820 in words is "eighty million, four hundred thirty-one thousand, eight hundred twenty".