| Base | Representation |
|---|---|
| bin | 11000001010000… |
| … | …00110100000000 |
| 3 | 112010022012200220 |
| 4 | 30011000310000 |
| 5 | 403334000030 |
| 6 | 32035143040 |
| 7 | 5010263016 |
| oct | 1405006400 |
| 9 | 463265626 |
| 10 | 202640640 |
| 11 | a4426a04 |
| 12 | 57a44a80 |
| 13 | 32ca0207 |
| 14 | 1ccac8b6 |
| 15 | 12bcba10 |
| hex | c140d00 |
202640640 has 144 divisors (see below), whose sum is σ = 654308928. Its totient is φ = 53444608.
The previous prime is 202640623. The next prime is 202640657. The reversal of 202640640 is 46046202.
It is an interprime number because it is at equal distance from previous prime (202640623) and next prime (202640657).
It is a Harshad number since it is a multiple of its sum of digits (24).
It is a self number, because there is not a number n which added to its sum of digits gives 202640640.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433687 + ... + 434153.
It is an arithmetic number, because the mean of its divisors is an integer number (4543812).
Almost surely, 2202640640 is an apocalyptic number.
202640640 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 202640640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327154464).
202640640 is an abundant number, since it is smaller than the sum of its proper divisors (451668288).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
202640640 is a wasteful number, since it uses less digits than its factorization.
202640640 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 604 (or 590 counting only the distinct ones).
The product of its (nonzero) digits is 2304, while the sum is 24.
The square root of 202640640 is about 14235.1901989401. The cubic root of 202640640 is about 587.3660621185.
Adding to 202640640 its reverse (46046202), we get a palindrome (248686842).
The spelling of 202640640 in words is "two hundred two million, six hundred forty thousand, six hundred forty".
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