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808031 = 7891297
BaseRepresentation
bin11000101010001011111
31112001102002
43011101133
5201324111
625152515
76603530
oct3052137
91461362
10808031
115020a4
1232b73b
13223a33
14170687
1510e63b
hexc545f

808031 has 8 divisors (see below), whose sum is σ = 934560. Its totient is φ = 684288.

The previous prime is 808021. The next prime is 808039. The reversal of 808031 is 130808.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-808031 is a prime.

It is a super-2 number, since 2×8080312 = 1305828193922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 807994 and 808012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26 + ... + 1271.

It is an arithmetic number, because the mean of its divisors is an integer number (116820).

2808031 is an apocalyptic number.

808031 is a deficient number, since it is larger than the sum of its proper divisors (126529).

808031 is a wasteful number, since it uses less digits than its factorization.

808031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1393.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 808031 is about 898.9054455281. The cubic root of 808031 is about 93.1413812901.

Adding to 808031 its reverse (130808), we get a palindrome (938839).

The spelling of 808031 in words is "eight hundred eight thousand, thirty-one".

Divisors: 1 7 89 623 1297 9079 115433 808031