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80827857 = 3211816443
BaseRepresentation
bin1001101000101…
…01010111010001
312122002110222100
410310111113101
5131142442412
612004231013
72001011505
oct464252721
9178073870
1080827857
1141697190
122309b469
1313990146
14aa40305
157168edc
hex4d155d1

80827857 has 12 divisors (see below), whose sum is σ = 127365264. Its totient is φ = 48986520.

The previous prime is 80827853. The next prime is 80827861. The reversal of 80827857 is 75872808.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (80827853) and next prime (80827861).

It is not a de Polignac number, because 80827857 - 22 = 80827853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80827853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 408123 + ... + 408320.

It is an arithmetic number, because the mean of its divisors is an integer number (10613772).

Almost surely, 280827857 is an apocalyptic number.

It is an amenable number.

80827857 is a deficient number, since it is larger than the sum of its proper divisors (46537407).

80827857 is a wasteful number, since it uses less digits than its factorization.

80827857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816460 (or 816457 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 80827857 is about 8990.4314134529. The cubic root of 80827857 is about 432.3681436178.

The spelling of 80827857 in words is "eighty million, eight hundred twenty-seven thousand, eight hundred fifty-seven".

Divisors: 1 3 9 11 33 99 816443 2449329 7347987 8980873 26942619 80827857