| Base | Representation |
|---|---|
| bin | 100100100111101… |
| … | …0010111000000000 |
| 3 | 10011122002202222000 |
| 4 | 1021033102320000 |
| 5 | 10004024334430 |
| 6 | 321532144000 |
| 7 | 42310112361 |
| oct | 11117227000 |
| 9 | 3148082860 |
| 10 | 1228746240 |
| 11 | 580660267 |
| 12 | 2a3608000 |
| 13 | 16774a8a7 |
| 14 | b9293b68 |
| 15 | 72d17e60 |
| hex | 493d2e00 |
1228746240 has 320 divisors, whose sum is σ = 4522478400. Its totient is φ = 315850752.
The previous prime is 1228746229. The next prime is 1228746251. The reversal of 1228746240 is 426478221.
1228746240 is a `hidden beast` number, since 1 + 2 + 28 + 7 + 4 + 624 + 0 = 666.
It is an interprime number because it is at equal distance from previous prime (1228746229) and next prime (1228746251).
It is a tau number, because it is divible by the number of its divisors (320).
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 = 1228746195 and 1228746204.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2004174 + ... + 2004786.
It is an arithmetic number, because the mean of its divisors is an integer number (14132745).
Almost surely, 21228746240 is an apocalyptic number.
1228746240 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 1228746240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2261239200).
1228746240 is an abundant number, since it is smaller than the sum of its proper divisors (3293732160).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1228746240 is an equidigital number, since it uses as much as digits as its factorization.
1228746240 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 674 (or 652 counting only the distinct ones).
The product of its (nonzero) digits is 43008, while the sum is 36.
The square root of 1228746240 is about 35053.4768603629. The cubic root of 1228746240 is about 1071.0770998015.
The spelling of 1228746240 in words is "one billion, two hundred twenty-eight million, seven hundred forty-six thousand, two hundred forty".
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