| Base | Representation |
|---|---|
| bin | 1111011110010… |
| … | …01101000100000 |
| 3 | 100001020120010200 |
| 4 | 13233021220200 |
| 5 | 231212110421 |
| 6 | 20514025200 |
| 7 | 3134200542 |
| oct | 757115040 |
| 9 | 301216120 |
| 10 | 129800736 |
| 11 | 672a623a |
| 12 | 37578200 |
| 13 | 20b78b90 |
| 14 | 1334b692 |
| 15 | b5de726 |
| hex | 7bc9a20 |
129800736 has 144 divisors (see below), whose sum is σ = 408694104. Its totient is φ = 38817792.
The previous prime is 129800717. The next prime is 129800747. The reversal of 129800736 is 637008921.
It can be written as a sum of positive squares in 4 ways, for example, as 83832336 + 45968400 = 9156^2 + 6780^2 .
It is a tau number, because it is divible by the number of its divisors (144).
It is a super-2 number, since 2×1298007362 = 33696462132283392, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a self number, because there is not a number n which added to its sum of digits gives 129800736.
It is a congruent number.
It is an unprimeable number.
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 23 ways as a sum of consecutive naturals, for example, 138060 + ... + 138996.
Almost surely, 2129800736 is an apocalyptic number.
129800736 is a gapful number since it is divisible by the number (16) 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 129800736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204347052).
129800736 is an abundant number, since it is smaller than the sum of its proper divisors (278893368).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
129800736 is a wasteful number, since it uses less digits than its factorization.
129800736 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1003 (or 992 counting only the distinct ones).
The product of its (nonzero) digits is 18144, while the sum is 36.
The square root of 129800736 is about 11393.0125954464. The cubic root of 129800736 is about 506.3207410976.
The spelling of 129800736 in words is "one hundred twenty-nine million, eight hundred thousand, seven hundred thirty-six".
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