Base | Representation |
---|---|
bin | 1001101001110… |
… | …10110011011000 |
3 | 12122101021100000 |
4 | 10310322303120 |
5 | 131212344313 |
6 | 12011413000 |
7 | 2002220550 |
oct | 464726330 |
9 | 178337300 |
10 | 80981208 |
11 | 41791420 |
12 | 23154160 |
13 | 13a14b99 |
14 | aa80160 |
15 | 7199673 |
hex | 4d3acd8 |
80981208 has 192 divisors, whose sum is σ = 284094720. Its totient is φ = 20995200.
The previous prime is 80981143. The next prime is 80981209. The reversal of 80981208 is 80218908.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (80981209) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149418 + ... + 149958.
It is an arithmetic number, because the mean of its divisors is an integer number (1479660).
Almost surely, 280981208 is an apocalyptic number.
80981208 is a gapful number since it is divisible by the number (88) 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 80981208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142047360).
80981208 is an abundant number, since it is smaller than the sum of its proper divisors (203113512).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
80981208 is a wasteful number, since it uses less digits than its factorization.
80981208 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 580 (or 564 counting only the distinct ones).
The product of its (nonzero) digits is 9216, while the sum is 36.
The square root of 80981208 is about 8998.9559394410. The cubic root of 80981208 is about 432.6414083143.
The spelling of 80981208 in words is "eighty million, nine hundred eighty-one thousand, two hundred eight".
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