Base | Representation |
---|---|
bin | 110001000101… |
… | …101100011100 |
3 | 220012210002200 |
4 | 301011230130 |
5 | 11243242010 |
6 | 1135451500 |
7 | 214244100 |
oct | 61055434 |
9 | 26183080 |
10 | 12868380 |
11 | 729a228 |
12 | 4386b90 |
13 | 2887335 |
14 | 19cd900 |
15 | 11e2cc0 |
hex | c45b1c |
12868380 has 108 divisors (see below), whose sum is σ = 45438120. Its totient is φ = 2939328.
The previous prime is 12868363. The next prime is 12868381. The reversal of 12868380 is 8386821.
It is a hoax number, since the sum of its digits (36) 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 (36).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (12868381) 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 35 ways as a sum of consecutive naturals, for example, 8091 + ... + 9549.
Almost surely, 212868380 is an apocalyptic number.
12868380 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 12868380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22719060).
12868380 is an abundant number, since it is smaller than the sum of its proper divisors (32569740).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12868380 is a wasteful number, since it uses less digits than its factorization.
12868380 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1488 (or 1476 counting only the distinct ones).
The product of its (nonzero) digits is 18432, while the sum is 36.
The square root of 12868380 is about 3587.2524304821. The cubic root of 12868380 is about 234.3372301803.
The spelling of 12868380 in words is "twelve million, eight hundred sixty-eight thousand, three hundred eighty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.075 sec. • engine limits •