80405320 has 64 divisors (see below), whose sum is σ = 189987840. Its totient is φ = 30585600.

The previous prime is 80405279. The next prime is 80405327. The reversal of 80405320 is 2350408.

It is a junction number, because it is equal to n+sod(n) for n = 80405291 and 80405300.

It is not an unprimeable number, because it can be changed into a prime (80405327) 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, 75109 + ... + 76171.

It is an arithmetic number, because the mean of its divisors is an integer number (2968560).

Almost surely, 2^80405320 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 80405320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94993920).

80405320 is an abundant number, since it is smaller than the sum of its proper divisors (109582520).

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

80405320 is a wasteful number, since it uses less digits than its factorization.

80405320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166 (or 1162 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 80405320 is about 8966.9013600017. The cubic root of 80405320 is about 431.6134087201.

Adding to 80405320 its reverse (2350408), we get a palindrome (82755728).

The spelling of 80405320 in words is "eighty million, four hundred five thousand, three hundred twenty".