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80671245 = 3519793583
BaseRepresentation
bin1001100111011…
…11001000001101
312121210112010220
410303233020031
5131122434440
612001021553
71666460064
oct463571015
9177715126
1080671245
114159a556
12230248b9
1313936a85
14a9dd1db
1571378d0
hex4cef20d

80671245 has 32 divisors (see below), whose sum is σ = 137625600. Its totient is φ = 40233024.

The previous prime is 80671229. The next prime is 80671271. The reversal of 80671245 is 54217608.

It is not a de Polignac number, because 80671245 - 24 = 80671229 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20724 + ... + 24306.

It is an arithmetic number, because the mean of its divisors is an integer number (4300800).

Almost surely, 280671245 is an apocalyptic number.

It is an amenable number.

80671245 is a deficient number, since it is larger than the sum of its proper divisors (56954355).

80671245 is a wasteful number, since it uses less digits than its factorization.

80671245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3689.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 80671245 is about 8981.7172634191. The cubic root of 80671245 is about 432.0887109915.

The spelling of 80671245 in words is "eighty million, six hundred seventy-one thousand, two hundred forty-five".

Divisors: 1 3 5 15 19 57 79 95 237 285 395 1185 1501 3583 4503 7505 10749 17915 22515 53745 68077 204231 283057 340385 849171 1021155 1415285 4245855 5378083 16134249 26890415 80671245