| Base | Representation |
|---|---|
| bin | 11001110011001… |
| … | …10100100011100 |
| 3 | 120002020121201200 |
| 4 | 30321212210130 |
| 5 | 420401124110 |
| 6 | 33250435500 |
| 7 | 5235411603 |
| oct | 1471464434 |
| 9 | 502217650 |
| 10 | 216426780 |
| 11 | 101192709 |
| 12 | 60592b90 |
| 13 | 35ab91ab |
| 14 | 20a5aa3a |
| 15 | 140016c0 |
| hex | ce6691c |
216426780 has 144 divisors (see below), whose sum is σ = 697080384. Its totient is φ = 54236160.
The previous prime is 216426767. The next prime is 216426781. The reversal of 216426780 is 87624612.
216426780 is a `hidden beast` number, since 2 + 1 + 642 + 6 + 7 + 8 + 0 = 666.
216426780 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 2×2164267802 = 93681102202336800, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (216426781) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 252112 + ... + 252968.
It is an arithmetic number, because the mean of its divisors is an integer number (4840836).
Almost surely, 2216426780 is an apocalyptic number.
216426780 is a gapful number since it is divisible by the number (20) 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 216426780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348540192).
216426780 is an abundant number, since it is smaller than the sum of its proper divisors (480653604).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
216426780 is a wasteful number, since it uses less digits than its factorization.
216426780 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 956 (or 951 counting only the distinct ones).
The product of its (nonzero) digits is 32256, while the sum is 36.
The square root of 216426780 is about 14711.4506422718. The cubic root of 216426780 is about 600.3949066908.
The spelling of 216426780 in words is "two hundred sixteen million, four hundred twenty-six thousand, seven hundred eighty".
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