Base | Representation |
---|---|
bin | 1001100101010… |
… | …00000101111000 |
3 | 12121020202000102 |
4 | 10302220011320 |
5 | 131034132110 |
6 | 11550454532 |
7 | 1664135561 |
oct | 462500570 |
9 | 177222012 |
10 | 80380280 |
11 | 41410992 |
12 | 22b04448 |
13 | 138644c6 |
14 | a965168 |
15 | 70cb5a5 |
hex | 4ca8178 |
80380280 has 32 divisors (see below), whose sum is σ = 185747040. Its totient is φ = 31282560.
The previous prime is 80380259. The next prime is 80380283. The reversal of 80380280 is 8208308.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (80380283) by changing a digit.
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 7 ways as a sum of consecutive naturals, for example, 25676 + ... + 28635.
It is an arithmetic number, because the mean of its divisors is an integer number (5804595).
Almost surely, 280380280 is an apocalyptic number.
It is an amenable number.
80380280 is an abundant number, since it is smaller than the sum of its proper divisors (105366760).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
80380280 is a wasteful number, since it uses less digits than its factorization.
80380280 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 54359 (or 54355 counting only the distinct ones).
The product of its (nonzero) digits is 3072, while the sum is 29.
The square root of 80380280 is about 8965.5050052967. The cubic root of 80380280 is about 431.5685994054.
Adding to 80380280 its reverse (8208308), we get a palindrome (88588588).
The spelling of 80380280 in words is "eighty million, three hundred eighty thousand, two hundred eighty".
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