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68635860 = 22353136901
BaseRepresentation
bin1000001011101…
…00110011010100
311210011001200220
410011310303110
5120032321420
610451034340
71462252356
oct405646324
9153131626
1068635860
113581a157
121ab9b9b0
13112b1947
1491890d6
15605b840
hex4174cd4

68635860 has 48 divisors (see below), whose sum is σ = 198385152. Its totient is φ = 17712000.

The previous prime is 68635849. The next prime is 68635867. The reversal of 68635860 is 6853686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68635867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16591 + ... + 20310.

It is an arithmetic number, because the mean of its divisors is an integer number (4133024).

Almost surely, 268635860 is an apocalyptic number.

68635860 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68635860 is an abundant number, since it is smaller than the sum of its proper divisors (129749292).

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

68635860 is a wasteful number, since it uses less digits than its factorization.

68635860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36944 (or 36942 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The square root of 68635860 is about 8284.6762157612. The cubic root of 68635860 is about 409.4338010442.

The spelling of 68635860 in words is "sixty-eight million, six hundred thirty-five thousand, eight hundred sixty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 31 60 62 93 124 155 186 310 372 465 620 930 1860 36901 73802 110703 147604 184505 221406 369010 442812 553515 738020 1107030 1143931 2214060 2287862 3431793 4575724 5719655 6863586 11439310 13727172 17158965 22878620 34317930 68635860