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809144 = 23714449
BaseRepresentation
bin11000101100010111000
31112002221022
43011202320
5201343034
625202012
76610010
oct3054270
91462838
10809144
11502a16
12330308
132243ab
14170c40
1510eb2e
hexc58b8

809144 has 16 divisors (see below), whose sum is σ = 1734000. Its totient is φ = 346752.

The previous prime is 809143. The next prime is 809147. The reversal of 809144 is 441908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7169 + ... + 7280.

It is an arithmetic number, because the mean of its divisors is an integer number (108375).

2809144 is an apocalyptic number.

It is an amenable number.

809144 is an abundant number, since it is smaller than the sum of its proper divisors (924856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

809144 is a wasteful number, since it uses less digits than its factorization.

809144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14462 (or 14458 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 809144 is about 899.5243187374. The cubic root of 809144 is about 93.1841266783.

Subtracting from 809144 its reverse (441908), we obtain a square (367236 = 6062).

The spelling of 809144 in words is "eight hundred nine thousand, one hundred forty-four".

Divisors: 1 2 4 7 8 14 28 56 14449 28898 57796 101143 115592 202286 404572 809144