Base | Representation |
---|---|
bin | 101000110010000… |
… | …0000000000000000 |
3 | 10112100212111111100 |
4 | 1101210000000000 |
5 | 10300302013210 |
6 | 343441214400 |
7 | 45624065055 |
oct | 12144000000 |
9 | 3470774440 |
10 | 1368391680 |
11 | 64246aa17 |
12 | 322331400 |
13 | 18a662726 |
14 | cda4502c |
15 | 801ee5c0 |
hex | 51900000 |
1368391680 has 252 divisors, whose sum is σ = 4907333340. Its totient is φ = 352321536.
The previous prime is 1368391679. The next prime is 1368391691. The reversal of 1368391680 is 861938631.
It is a happy number.
It can be written as a sum of positive squares in 2 ways, for example, as 603979776 + 764411904 = 24576^2 + 27648^2 .
It is a Harshad number since it is a multiple of its sum of digits (45).
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47185906 + ... + 47185934.
It is an arithmetic number, because the mean of its divisors is an integer number (19473545).
Almost surely, 21368391680 is an apocalyptic number.
1368391680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
1368391680 is a droll number since its even prime factors and its odd prime factors have the same sum.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1368391680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2453666670).
1368391680 is an abundant number, since it is smaller than the sum of its proper divisors (3538941660).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1368391680 is an frugal number, since it uses more digits than its factorization.
1368391680 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 80 (or 39 counting only the distinct ones).
The product of its (nonzero) digits is 186624, while the sum is 45.
The square root of 1368391680 is about 36991.7785460499. The cubic root of 1368391680 is about 1110.2057568414.
The spelling of 1368391680 in words is "one billion, three hundred sixty-eight million, three hundred ninety-one thousand, six hundred eighty".
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