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80129192 = 23111389787
BaseRepresentation
bin1001100011010…
…10110010101000
312120202222120212
410301222302220
5131003113232
611541240252
71662041543
oct461526250
9176688525
1080129192
114125a280
1222a03088
13137a7130
14a8db85a
15707beb2
hex4c6aca8

80129192 has 64 divisors (see below), whose sum is σ = 178718400. Its totient is φ = 33200640.

The previous prime is 80129131. The next prime is 80129209. The reversal of 80129192 is 29192108.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101423 + ... + 102209.

It is an arithmetic number, because the mean of its divisors is an integer number (2792475).

Almost surely, 280129192 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 80129192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89359200).

80129192 is an abundant number, since it is smaller than the sum of its proper divisors (98589208).

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

80129192 is a wasteful number, since it uses less digits than its factorization.

80129192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 80129192 is about 8951.4910489817. The cubic root of 80129192 is about 431.1187597002.

The spelling of 80129192 in words is "eighty million, one hundred twenty-nine thousand, one hundred ninety-two".

Divisors: 1 2 4 8 11 13 22 26 44 52 88 89 104 143 178 286 356 572 712 787 979 1144 1157 1574 1958 2314 3148 3916 4628 6296 7832 8657 9256 10231 12727 17314 20462 25454 34628 40924 50908 69256 70043 81848 101816 112541 140086 225082 280172 450164 560344 770473 900328 910559 1540946 1821118 3081892 3642236 6163784 7284472 10016149 20032298 40064596 80129192