| Base | Representation |
|---|---|
| bin | 100100001100110… |
| … | …1011101000000000 |
| 3 | 10010122122201221200 |
| 4 | 1020121223220000 |
| 5 | 4441430114330 |
| 6 | 320311021200 |
| 7 | 42046465425 |
| oct | 11031535000 |
| 9 | 3118581850 |
| 10 | 1214691840 |
| 11 | 573730a5a |
| 12 | 29a96a800 |
| 13 | 16486978b |
| 14 | b7475d4c |
| 15 | 7198da60 |
| hex | 4866ba00 |
1214691840 has 120 divisors (see below), whose sum is σ = 4206899268. Its totient is φ = 323911680.
The previous prime is 1214691787. The next prime is 1214691851. The reversal of 1214691840 is 481964121.
1214691840 is a `hidden beast` number, since 12 + 1 + 469 + 184 + 0 = 666.
It can be written as a sum of positive squares in 2 ways, for example, as 1100116224 + 114575616 = 33168^2 + 10704^2 .
It is a tau number, because it is divible by the number of its divisors (120).
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 1214691795 and 1214691804.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3321 + ... + 49400.
Almost surely, 21214691840 is an apocalyptic number.
1214691840 is a gapful number since it is divisible by the number (10) 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 1214691840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2103449634).
1214691840 is an abundant number, since it is smaller than the sum of its proper divisors (2992207428).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1214691840 is an equidigital number, since it uses as much as digits as its factorization.
1214691840 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 52750 (or 52731 counting only the distinct ones).
The product of its (nonzero) digits is 13824, while the sum is 36.
The square root of 1214691840 is about 34852.4294705548. The cubic root of 1214691840 is about 1066.9777703659.
The spelling of 1214691840 in words is "one billion, two hundred fourteen million, six hundred ninety-one thousand, eight hundred forty".
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