| Base | Representation |
|---|---|
| bin | 11001010110110… |
| … | …00110100011000 |
| 3 | 112211020022011002 |
| 4 | 30223120310120 |
| 5 | 413422403230 |
| 6 | 33034524132 |
| 7 | 5161631621 |
| oct | 1453306430 |
| 9 | 484208132 |
| 10 | 212700440 |
| 11 | aa077a97 |
| 12 | 5b296648 |
| 13 | 350b3064 |
| 14 | 2036aa48 |
| 15 | 13a17545 |
| hex | cad8d18 |
212700440 has 64 divisors (see below), whose sum is σ = 506304000. Its totient is φ = 80196480.
The previous prime is 212700419. The next prime is 212700443. The reversal of 212700440 is 44007212.
212700440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.
It is a Harshad number since it is a multiple of its sum of digits (20).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (212700443) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181055 + ... + 182225.
It is an arithmetic number, because the mean of its divisors is an integer number (7911000).
Almost surely, 2212700440 is an apocalyptic number.
212700440 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 212700440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253152000).
212700440 is an abundant number, since it is smaller than the sum of its proper divisors (293603560).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
212700440 is a wasteful number, since it uses less digits than its factorization.
212700440 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1440 (or 1436 counting only the distinct ones).
The product of its (nonzero) digits is 448, while the sum is 20.
The square root of 212700440 is about 14584.2531519444. The cubic root of 212700440 is about 596.9291619208.
Adding to 212700440 its reverse (44007212), we get a palindrome (256707652).
The spelling of 212700440 in words is "two hundred twelve million, seven hundred thousand, four hundred forty".
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