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808431 = 313191091
BaseRepresentation
bin11000101010111101111
31112001221220
43011113233
5201332211
625154423
76604641
oct3052757
91461856
10808431
11502428
1232ba13
13223c80
14170891
1510e806
hexc55ef

808431 has 16 divisors (see below), whose sum is σ = 1223040. Its totient is φ = 470880.

The previous prime is 808421. The next prime is 808439. The reversal of 808431 is 134808.

It is not a de Polignac number, because 808431 - 25 = 808399 is a prime.

It is a super-2 number, since 2×8084312 = 1307121363522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808439) 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 15 ways as a sum of consecutive naturals, for example, 196 + ... + 1286.

It is an arithmetic number, because the mean of its divisors is an integer number (76440).

2808431 is an apocalyptic number.

808431 is a deficient number, since it is larger than the sum of its proper divisors (414609).

808431 is a wasteful number, since it uses less digits than its factorization.

808431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1126.

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 808431 is about 899.1279108114. The cubic root of 808431 is about 93.1567480300.

The spelling of 808431 in words is "eight hundred eight thousand, four hundred thirty-one".

Divisors: 1 3 13 19 39 57 247 741 1091 3273 14183 20729 42549 62187 269477 808431