80891382 has 64 divisors (see below), whose sum is σ = 196680960. Its totient is φ = 21840000.

The previous prime is 80891323. The next prime is 80891387. The reversal of 80891382 is 28319808.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 80891382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80891387) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23257 + ... + 26507.

It is an arithmetic number, because the mean of its divisors is an integer number (3073140).

Almost surely, 2^80891382 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80891382, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98340480).

80891382 is an abundant number, since it is smaller than the sum of its proper divisors (115789578).

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

80891382 is a wasteful number, since it uses less digits than its factorization.

80891382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 80891382 is about 8993.9636423548. The cubic root of 80891382 is about 432.4813842545.

The spelling of 80891382 in words is "eighty million, eight hundred ninety-one thousand, three hundred eighty-two".