Base | Representation |
---|---|
bin | 101111111111… |
… | …011000011100 |
3 | 212200011001000 |
4 | 233333120130 |
5 | 11210033010 |
6 | 1125350300 |
7 | 211634331 |
oct | 57773034 |
9 | 25604030 |
10 | 12580380 |
11 | 711290a |
12 | 4268390 |
13 | 27b6217 |
14 | 1956988 |
15 | 11877c0 |
hex | bff61c |
12580380 has 48 divisors (see below), whose sum is σ = 39140640. Its totient is φ = 3354624.
The previous prime is 12580367. The next prime is 12580397. The reversal of 12580380 is 8308521.
It is a happy number.
12580380 is a `hidden beast` number, since 1 + 2 + 580 + 3 + 80 = 666.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11109 + ... + 12188.
It is an arithmetic number, because the mean of its divisors is an integer number (815430).
Almost surely, 212580380 is an apocalyptic number.
12580380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
12580380 is an abundant number, since it is smaller than the sum of its proper divisors (26560260).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12580380 is a wasteful number, since it uses less digits than its factorization.
12580380 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 23315 (or 23307 counting only the distinct ones).
The product of its (nonzero) digits is 1920, while the sum is 27.
The square root of 12580380 is about 3546.8831387572. The cubic root of 12580380 is about 232.5758337436.
The spelling of 12580380 in words is "twelve million, five hundred eighty thousand, three hundred eighty".
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