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268067280 = 243513151569
BaseRepresentation
bin11111111101001…
…10000111010000
3200200102020011210
433332212013100
51022111123110
642333340120
76433351155
oct1776460720
9620366153
10268067280
11128353a08
1275937640
13436ca1c0
142786022c
1518802520
hexffa61d0

268067280 has 160 divisors (see below), whose sum is σ = 902442240. Its totient is φ = 65433600.

The previous prime is 268067279. The next prime is 268067281. The reversal of 268067280 is 82760862.

It is an interprime number because it is at equal distance from previous prime (268067279) and next prime (268067281).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268067281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 470836 + ... + 471404.

It is an arithmetic number, because the mean of its divisors is an integer number (5640264).

Almost surely, 2268067280 is an apocalyptic number.

268067280 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 268067280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451221120).

268067280 is an abundant number, since it is smaller than the sum of its proper divisors (634374960).

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

268067280 is a wasteful number, since it uses less digits than its factorization.

268067280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 268067280 is about 16372.7603048478. The cubic root of 268067280 is about 644.7845202933.

The spelling of 268067280 in words is "two hundred sixty-eight million, sixty-seven thousand, two hundred eighty".

Divisors: 1 2 3 4 5 6 8 10 12 13 15 16 20 24 26 30 39 40 48 52 60 65 78 80 104 120 130 151 156 195 208 240 260 302 312 390 453 520 569 604 624 755 780 906 1040 1138 1208 1510 1560 1707 1812 1963 2265 2276 2416 2845 3020 3120 3414 3624 3926 4530 4552 5690 5889 6040 6828 7248 7397 7852 8535 9060 9104 9815 11380 11778 12080 13656 14794 15704 17070 18120 19630 22191 22760 23556 27312 29445 29588 31408 34140 36240 36985 39260 44382 45520 47112 58890 59176 68280 73970 78520 85919 88764 94224 110955 117780 118352 136560 147940 157040 171838 177528 221910 235560 257757 295880 343676 355056 429595 443820 471120 515514 591760 687352 859190 887640 1031028 1116947 1288785 1374704 1718380 1775280 2062056 2233894 2577570 3350841 3436760 4124112 4467788 5155140 5584735 6701682 6873520 8935576 10310280 11169470 13403364 16754205 17871152 20620560 22338940 26806728 33508410 44677880 53613456 67016820 89355760 134033640 268067280