Base | Representation |
---|---|
bin | 1111011110010… |
… | …01100100000010 |
3 | 100001020112202002 |
4 | 13233021210002 |
5 | 231212103300 |
6 | 20514024002 |
7 | 3134166653 |
oct | 757114402 |
9 | 301215662 |
10 | 129800450 |
11 | 672a5aaa |
12 | 37578002 |
13 | 20b78a00 |
14 | 1334b52a |
15 | b5de5d5 |
hex | 7bc9902 |
129800450 has 36 divisors (see below), whose sum is σ = 261445878. Its totient is φ = 47923200.
The previous prime is 129800443. The next prime is 129800459. The reversal of 129800450 is 54008921.
It is a Cunningham number, because it is equal to 113932+1.
It can be written as a sum of positive squares in 9 ways, for example, as 1 + 129800449 = 1^2 + 11393^2 .
It is not an unprimeable number, because it can be changed into a prime (129800459) 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 17 ways as a sum of consecutive naturals, for example, 770 + ... + 16130.
Almost surely, 2129800450 is an apocalyptic number.
129800450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
129800450 is an abundant number, since it is smaller than the sum of its proper divisors (131645428).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
129800450 is a wasteful number, since it uses less digits than its factorization.
129800450 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 15399 (or 15381 counting only the distinct ones).
The product of its (nonzero) digits is 2880, while the sum is 29.
The square root of 129800450 is about 11393.0000438866. Note that the first 4 decimals coincide. The cubic root of 129800450 is about 506.3203692254.
The spelling of 129800450 in words is "one hundred twenty-nine million, eight hundred thousand, four hundred fifty".
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