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68149160 = 2353154959
BaseRepresentation
bin1000000111111…
…01111110101000
311202020100001222
410003331332220
5114421233120
610432401212
71455154412
oct403757650
9152210058
1068149160
1135517522
121a9a6208
1311171261
14909d9b2
155eb2525
hex40fdfa8

68149160 has 32 divisors (see below), whose sum is σ = 158284800. Its totient is φ = 26379840.

The previous prime is 68149099. The next prime is 68149171. The reversal of 68149160 is 6194186.

It is a self number, because there is not a number n which added to its sum of digits gives 68149160.

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, 26240 + ... + 28719.

It is an arithmetic number, because the mean of its divisors is an integer number (4946400).

Almost surely, 268149160 is an apocalyptic number.

It is an amenable number.

68149160 is an abundant number, since it is smaller than the sum of its proper divisors (90135640).

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

68149160 is a wasteful number, since it uses less digits than its factorization.

68149160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55001 (or 54997 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 68149160 is about 8255.2504504709. The cubic root of 68149160 is about 408.4637332614.

The spelling of 68149160 in words is "sixty-eight million, one hundred forty-nine thousand, one hundred sixty".

Divisors: 1 2 4 5 8 10 20 31 40 62 124 155 248 310 620 1240 54959 109918 219836 274795 439672 549590 1099180 1703729 2198360 3407458 6814916 8518645 13629832 17037290 34074580 68149160