| Base | Representation |
|---|---|
| bin | 101100010101… |
| … | …0101101111000 |
| 3 | 1121201220021120 |
| 4 | 1120222231320 |
| 5 | 21422244030 |
| 6 | 2150105240 |
| 7 | 401365500 |
| oct | 130525570 |
| 9 | 47656246 |
| 10 | 23243640 |
| 11 | 12136322 |
| 12 | 794b220 |
| 13 | 4a7a944 |
| 14 | 3130a00 |
| 15 | 2092010 |
| hex | 162ab78 |
23243640 has 192 divisors, whose sum is σ = 83721600. Its totient is φ = 5144832.
The previous prime is 23243629. The next prime is 23243651. The reversal of 23243640 is 4634232.
It is a happy number.
It is an interprime number because it is at equal distance from previous prime (23243629) and next prime (23243651).
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 23243640.
It is a congruent number.
It is an unprimeable number.
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 47 ways as a sum of consecutive naturals, for example, 346887 + ... + 346953.
It is an arithmetic number, because the mean of its divisors is an integer number (436050).
Almost surely, 223243640 is an apocalyptic number.
23243640 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 23243640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41860800).
23243640 is an abundant number, since it is smaller than the sum of its proper divisors (60477960).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
23243640 is a wasteful number, since it uses less digits than its factorization.
23243640 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 154 (or 143 counting only the distinct ones).
The product of its (nonzero) digits is 3456, while the sum is 24.
The square root of 23243640 is about 4821.1658341111. The cubic root of 23243640 is about 285.3873465065.
Adding to 23243640 its reverse (4634232), we get a palindrome (27877872).
The spelling of 23243640 in words is "twenty-three million, two hundred forty-three thousand, six hundred forty".
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