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80380 = 2254019
BaseRepresentation
bin10011100111111100
311002021001
4103213330
510033010
61420044
7453226
oct234774
9132231
1080380
1155433
123a624
132a781
1421416
1518c3a
hex139fc

80380 has 12 divisors (see below), whose sum is σ = 168840. Its totient is φ = 32144.

The previous prime is 80369. The next prime is 80387. The reversal of 80380 is 8308.

80380 is nontrivially palindromic in base 9.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80387) by changing a digit.

80380 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1990 + ... + 2029.

It is an arithmetic number, because the mean of its divisors is an integer number (14070).

280380 is an apocalyptic number.

It is an amenable number.

80380 is an abundant number, since it is smaller than the sum of its proper divisors (88460).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84420).

80380 is a wasteful number, since it uses less digits than its factorization.

80380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4028 (or 4026 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 80380 is about 283.5136681009. The cubic root of 80380 is about 43.1568098290.

Adding to 80380 its reverse (8308), we get a palindrome (88688).

The spelling of 80380 in words is "eighty thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 4019 8038 16076 20095 40190 80380