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68876280 = 233251117393
BaseRepresentation
bin1000001101011…
…11011111111000
311210121021111100
410012233133320
5120113020110
610500131400
71464303324
oct406573770
9153537440
1068876280
1135973850
121b096b60
13113671c5
14920c984
1560a7bc0
hex41af7f8

68876280 has 96 divisors (see below), whose sum is σ = 244211760. Its totient is φ = 16696320.

The previous prime is 68876267. The next prime is 68876287. The reversal of 68876280 is 8267886.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68876287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4737 + ... + 12656.

Almost surely, 268876280 is an apocalyptic number.

68876280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68876280 is an abundant number, since it is smaller than the sum of its proper divisors (175335480).

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

68876280 is a wasteful number, since it uses less digits than its factorization.

68876280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17421 (or 17414 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 68876280 is about 8299.1734528205. The cubic root of 68876280 is about 409.9113034388.

The spelling of 68876280 in words is "sixty-eight million, eight hundred seventy-six thousand, two hundred eighty".

Divisors: 1 2 3 4 5 6 8 9 10 11 12 15 18 20 22 24 30 33 36 40 44 45 55 60 66 72 88 90 99 110 120 132 165 180 198 220 264 330 360 396 440 495 660 792 990 1320 1980 3960 17393 34786 52179 69572 86965 104358 139144 156537 173930 191323 208716 260895 313074 347860 382646 417432 521790 573969 626148 695720 765292 782685 956615 1043580 1147938 1252296 1530584 1565370 1721907 1913230 2087160 2295876 2869845 3130740 3443814 3826460 4591752 5739690 6261480 6887628 7652920 8609535 11479380 13775256 17219070 22958760 34438140 68876280