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80712960 = 283521019
BaseRepresentation
bin1001100111110…
…01010100000000
312121212122100220
410303321110000
5131130303320
612001543040
72000022516
oct463712400
9177778326
1080712960
1141618929
1223044a80
131394ca63
14aa104b6
157144e40
hex4cf9500

80712960 has 72 divisors (see below), whose sum is σ = 257789280. Its totient is φ = 21522432.

The previous prime is 80712949. The next prime is 80712967. The reversal of 80712960 is 6921708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80712967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6670 + ... + 14349.

Almost surely, 280712960 is an apocalyptic number.

80712960 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

80712960 is an abundant number, since it is smaller than the sum of its proper divisors (177076320).

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

80712960 is a wasteful number, since it uses less digits than its factorization.

80712960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21043 (or 21029 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 80712960 is about 8984.0391806804. The cubic root of 80712960 is about 432.1631756687.

The spelling of 80712960 in words is "eighty million, seven hundred twelve thousand, nine hundred sixty".

Divisors: 1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 64 80 96 120 128 160 192 240 256 320 384 480 640 768 960 1280 1920 3840 21019 42038 63057 84076 105095 126114 168152 210190 252228 315285 336304 420380 504456 630570 672608 840760 1008912 1261140 1345216 1681520 2017824 2522280 2690432 3363040 4035648 5044560 5380864 6726080 8071296 10089120 13452160 16142592 20178240 26904320 40356480 80712960