| Base | Representation |
|---|---|
| bin | 10100111010100110… |
| … | …01001110111010000 |
| 3 | 1001222120022012212210 |
| 4 | 22131103021313100 |
| 5 | 140444104304030 |
| 6 | 5054123552120 |
| 7 | 545156513025 |
| oct | 123523116720 |
| 9 | 31876265783 |
| 10 | 11228978640 |
| 11 | 4842513940 |
| 12 | 221468b640 |
| 13 | 109c4b9a79 |
| 14 | 78747754c |
| 15 | 45ac1ebb0 |
| hex | 29d4c9dd0 |
11228978640 has 160 divisors (see below), whose sum is σ = 39284092800. Its totient is φ = 2628290560.
The previous prime is 11228978639. The next prime is 11228978653. The reversal of 11228978640 is 4687982211.
It is a happy number.
11228978640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a super-2 number, since 2×112289786402 (a number of 21 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (48).
It is a self number, because there is not a number n which added to its sum of digits gives 11228978640.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3226 + ... + 149894.
It is an arithmetic number, because the mean of its divisors is an integer number (245525580).
Almost surely, 211228978640 is an apocalyptic number.
11228978640 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 11228978640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19642046400).
11228978640 is an abundant number, since it is smaller than the sum of its proper divisors (28055114160).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
11228978640 is a wasteful number, since it uses less digits than its factorization.
11228978640 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 146725 (or 146719 counting only the distinct ones).
The product of its (nonzero) digits is 387072, while the sum is 48.
The spelling of 11228978640 in words is "eleven billion, two hundred twenty-eight million, nine hundred seventy-eight thousand, six hundred forty".
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