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80180285 = 5191814663
BaseRepresentation
bin1001100011101…
…11010000111101
312120212120200012
410301313100331
5131011232120
611542313005
71662343523
oct461672075
9176776605
1080180285
11412946a9
1222a28765
13137c4473
14a912313
15708c1c5
hex4c7743d

80180285 has 16 divisors (see below), whose sum is σ = 101861760. Its totient is φ = 60419520.

The previous prime is 80180281. The next prime is 80180293. The reversal of 80180285 is 58208108.

It is not a de Polignac number, because 80180285 - 22 = 80180281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80180281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14864 + ... + 19526.

It is an arithmetic number, because the mean of its divisors is an integer number (6366360).

Almost surely, 280180285 is an apocalyptic number.

It is an amenable number.

80180285 is a deficient number, since it is larger than the sum of its proper divisors (21681475).

80180285 is a wasteful number, since it uses less digits than its factorization.

80180285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4868.

The product of its (nonzero) digits is 5120, while the sum is 32.

The square root of 80180285 is about 8954.3444762864. The cubic root of 80180285 is about 431.2103720500.

The spelling of 80180285 in words is "eighty million, one hundred eighty thousand, two hundred eighty-five".

Divisors: 1 5 19 95 181 905 3439 4663 17195 23315 88597 442985 844003 4220015 16036057 80180285