| Base | Representation |
|---|---|
| bin | 101110110000… |
| … | …111000011000 |
| 3 | 212001210222010 |
| 4 | 232300320120 |
| 5 | 11114240330 |
| 6 | 1114425520 |
| 7 | 206125026 |
| oct | 56607030 |
| 9 | 25053863 |
| 10 | 12258840 |
| 11 | 6a13280 |
| 12 | 41322a0 |
| 13 | 2702a69 |
| 14 | 18b1716 |
| 15 | 11223b0 |
| hex | bb0e18 |
12258840 has 128 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 2880000.
The previous prime is 12258833. The next prime is 12258859. The reversal of 12258840 is 4885221.
It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (30).
It is a junction number, because it is equal to n+sod(n) for n = 12258798 and 12258807.
It is a congruent number.
It is an unprimeable number.
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, 48715 + ... + 48965.
It is an arithmetic number, because the mean of its divisors is an integer number (323190).
Almost surely, 212258840 is an apocalyptic number.
12258840 is a gapful number since it is divisible by the number (10) 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 12258840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20684160).
12258840 is an abundant number, since it is smaller than the sum of its proper divisors (29109480).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12258840 is a wasteful number, since it uses less digits than its factorization.
12258840 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 313 (or 309 counting only the distinct ones).
The product of its (nonzero) digits is 5120, while the sum is 30.
The square root of 12258840 is about 3501.2626293953. The cubic root of 12258840 is about 230.5772519595.
It can be divided in two parts, 12 and 258840, that added together give a palindrome (258852).
The spelling of 12258840 in words is "twelve million, two hundred fifty-eight thousand, eight hundred forty".
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