| Base | Representation |
|---|---|
| bin | 11001010001100… |
| … | …11100010010000 |
| 3 | 112202221220111000 |
| 4 | 30220303202100 |
| 5 | 413234222230 |
| 6 | 33012222000 |
| 7 | 5153112066 |
| oct | 1450634220 |
| 9 | 482856430 |
| 10 | 212023440 |
| 11 | a9755392 |
| 12 | 5b00a900 |
| 13 | 34c06b75 |
| 14 | 20232036 |
| 15 | 13931b60 |
| hex | ca33890 |
212023440 has 160 divisors (see below), whose sum is σ = 738167040. Its totient is φ = 55931904.
The previous prime is 212023429. The next prime is 212023447. The reversal of 212023440 is 44320212.
212023440 is a `hidden beast` number, since 21 + 202 + 3 + 440 = 666.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (212023447) by changing a digit.
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 31 ways as a sum of consecutive naturals, for example, 222004 + ... + 222956.
It is an arithmetic number, because the mean of its divisors is an integer number (4613544).
Almost surely, 2212023440 is an apocalyptic number.
212023440 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 212023440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369083520).
212023440 is an abundant number, since it is smaller than the sum of its proper divisors (526143600).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
212023440 is a wasteful number, since it uses less digits than its factorization.
212023440 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1078 (or 1066 counting only the distinct ones).
The product of its (nonzero) digits is 384, while the sum is 18.
The square root of 212023440 is about 14561.0246892174. The cubic root of 212023440 is about 596.2951708194.
Adding to 212023440 its reverse (44320212), we get a palindrome (256343652).
It can be divided in two parts, 21202 and 3440, that added together give a palindrome (24642).
The spelling of 212023440 in words is "two hundred twelve million, twenty-three thousand, four hundred forty".
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