80391680 has 80 divisors (see below), whose sum is σ = 199165824. Its totient is φ = 31088640.

The previous prime is 80391677. The next prime is 80391721. The reversal of 80391680 is 8619308.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 80391680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78854 + ... + 79866.

Almost surely, 2^80391680 is an apocalyptic number.

80391680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80391680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99582912).

80391680 is an abundant number, since it is smaller than the sum of its proper divisors (118774144).

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

80391680 is a wasteful number, since it uses less digits than its factorization.

80391680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 80391680 is about 8966.1407528546. The cubic root of 80391680 is about 431.5890009660.

The spelling of 80391680 in words is "eighty million, three hundred ninety-one thousand, six hundred eighty".