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80869355 = 572714649
BaseRepresentation
bin1001101000111…
…11011111101011
312122011120220022
410310133133223
5131200304410
612005151055
72001243500
oct464373753
9178146808
1080869355
1141715386
12230bb48b
13139a5cb8
14aa514a7
157176455
hex4d1f7eb

80869355 has 24 divisors (see below), whose sum is σ = 114501600. Its totient is φ = 54660480.

The previous prime is 80869351. The next prime is 80869363. The reversal of 80869355 is 55396808.

It is not a de Polignac number, because 80869355 - 22 = 80869351 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80869351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15071 + ... + 19719.

It is an arithmetic number, because the mean of its divisors is an integer number (4770900).

Almost surely, 280869355 is an apocalyptic number.

80869355 is a deficient number, since it is larger than the sum of its proper divisors (33632245).

80869355 is a wasteful number, since it uses less digits than its factorization.

80869355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4739 (or 4732 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 80869355 is about 8992.7390154502. The cubic root of 80869355 is about 432.4421253041.

The spelling of 80869355 in words is "eighty million, eight hundred sixty-nine thousand, three hundred fifty-five".

Divisors: 1 5 7 35 49 71 245 355 497 2485 3479 4649 17395 23245 32543 162715 227801 330079 1139005 1650395 2310553 11552765 16173871 80869355