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68680160 = 255479133
BaseRepresentation
bin1000001011111…
…11100111100000
311210020022110122
410011333213200
5120040231120
610452015412
71462525463
oct405774740
9153208418
1068680160
113584a46a
121b001568
13112c8b63
14919b2da
156069a25
hex417f9e0

68680160 has 48 divisors (see below), whose sum is σ = 165727296. Its totient is φ = 26884608.

The previous prime is 68680147. The next prime is 68680181. The reversal of 68680160 is 6108686.

It is a self number, because there is not a number n which added to its sum of digits gives 68680160.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2954 + ... + 12086.

It is an arithmetic number, because the mean of its divisors is an integer number (3452652).

Almost surely, 268680160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68680160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82863648).

68680160 is an abundant number, since it is smaller than the sum of its proper divisors (97047136).

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

68680160 is a wasteful number, since it uses less digits than its factorization.

68680160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9195 (or 9187 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 68680160 is about 8287.3493953133. The cubic root of 68680160 is about 409.5218697617.

The spelling of 68680160 in words is "sixty-eight million, six hundred eighty thousand, one hundred sixty".

Divisors: 1 2 4 5 8 10 16 20 32 40 47 80 94 160 188 235 376 470 752 940 1504 1880 3760 7520 9133 18266 36532 45665 73064 91330 146128 182660 292256 365320 429251 730640 858502 1461280 1717004 2146255 3434008 4292510 6868016 8585020 13736032 17170040 34340080 68680160