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247380 = 223571931
BaseRepresentation
bin111100011001010100
3110120100020
4330121110
530404010
65145140
72050140
oct743124
9416306
10247380
11159951
12bb1b0
13887a3
1466220
154d470
hex3c654

247380 has 96 divisors (see below), whose sum is σ = 860160. Its totient is φ = 51840.

The previous prime is 247369. The next prime is 247381. The reversal of 247380 is 83742.

247380 is nontrivially palindromic in base 11.

247380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2473802 = 122393728800, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 247380.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247381) by changing a digit.

247380 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7965 + ... + 7995.

It is an arithmetic number, because the mean of its divisors is an integer number (8960).

2247380 is an apocalyptic number.

247380 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 247380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430080).

247380 is an abundant number, since it is smaller than the sum of its proper divisors (612780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

247380 is a wasteful number, since it uses less digits than its factorization.

247380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69 (or 67 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 247380 is about 497.3730993932. The cubic root of 247380 is about 62.7752130126.

The spelling of 247380 in words is "two hundred forty-seven thousand, three hundred eighty".

Divisors: 1 2 3 4 5 6 7 10 12 14 15 19 20 21 28 30 31 35 38 42 57 60 62 70 76 84 93 95 105 114 124 133 140 155 186 190 210 217 228 266 285 310 372 380 399 420 434 465 532 570 589 620 651 665 798 868 930 1085 1140 1178 1302 1330 1596 1767 1860 1995 2170 2356 2604 2660 2945 3255 3534 3990 4123 4340 5890 6510 7068 7980 8246 8835 11780 12369 13020 16492 17670 20615 24738 35340 41230 49476 61845 82460 123690 247380