Search a number
-
+
851864 = 23138191
BaseRepresentation
bin11001111111110011000
31121021112112
43033332120
5204224424
630131452
710145366
oct3177630
91537475
10851864
11532022
12350b88
1323a980
14182636
1511c60e
hexcff98

851864 has 16 divisors (see below), whose sum is σ = 1720320. Its totient is φ = 393120.

The previous prime is 851863. The next prime is 851881. The reversal of 851864 is 468158.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 851864.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 851864.

It is not an unprimeable number, because it can be changed into a prime (851863) 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 3 ways as a sum of consecutive naturals, for example, 3992 + ... + 4199.

It is an arithmetic number, because the mean of its divisors is an integer number (107520).

851864 is a Friedman number, since it can be written as (16^4-8)*(8+5), using all its digits and the basic arithmetic operations.

2851864 is an apocalyptic number.

It is an amenable number.

851864 is an abundant number, since it is smaller than the sum of its proper divisors (868456).

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

851864 is a wasteful number, since it uses less digits than its factorization.

851864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210 (or 8206 counting only the distinct ones).

The product of its digits is 7680, while the sum is 32.

The square root of 851864 is about 922.9647880607. The cubic root of 851864 is about 94.7960166153.

The spelling of 851864 in words is "eight hundred fifty-one thousand, eight hundred sixty-four".

Divisors: 1 2 4 8 13 26 52 104 8191 16382 32764 65528 106483 212966 425932 851864