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80668 = 2274367
BaseRepresentation
bin10011101100011100
311002122201
4103230130
510040133
61421244
7454120
oct235434
9132581
1080668
1155675
123a824
132a943
1421580
1518d7d
hex13b1c

80668 has 24 divisors (see below), whose sum is σ = 167552. Its totient is φ = 33264.

The previous prime is 80657. The next prime is 80669. The reversal of 80668 is 86608.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1171 + ... + 1237.

280668 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 80668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83776).

80668 is an abundant number, since it is smaller than the sum of its proper divisors (86884).

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

80668 is a wasteful number, since it uses less digits than its factorization.

80668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 80668 is about 284.0211259748. The cubic root of 80668 is about 43.2082917326.

The spelling of 80668 in words is "eighty thousand, six hundred sixty-eight".

Divisors: 1 2 4 7 14 28 43 67 86 134 172 268 301 469 602 938 1204 1876 2881 5762 11524 20167 40334 80668