Base | Representation |
---|---|
bin | 1001100111100… |
… | …11011101000000 |
3 | 12121211102110000 |
4 | 10303303131000 |
5 | 131124021320 |
6 | 12001240000 |
7 | 1666562532 |
oct | 463633500 |
9 | 177742400 |
10 | 80688960 |
11 | 416018a0 |
12 | 23033000 |
13 | 13941b61 |
14 | aa05852 |
15 | 713cc90 |
hex | 4cf3740 |
80688960 has 280 divisors, whose sum is σ = 314224416. Its totient is φ = 19491840.
The previous prime is 80688947. The next prime is 80688961. The reversal of 80688960 is 6988608.
It is a Harshad number since it is a multiple of its sum of digits (45).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (80688961) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 284979 + ... + 285261.
Almost surely, 280688960 is an apocalyptic number.
80688960 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 80688960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157112208).
80688960 is an abundant number, since it is smaller than the sum of its proper divisors (233535456).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
80688960 is a wasteful number, since it uses less digits than its factorization.
80688960 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 323 (or 304 counting only the distinct ones).
The product of its (nonzero) digits is 165888, while the sum is 45.
The square root of 80688960 is about 8982.7033792729. The cubic root of 80688960 is about 432.1203368465.
The spelling of 80688960 in words is "eighty million, six hundred eighty-eight thousand, nine hundred sixty".
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