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6880820 = 2251492309
BaseRepresentation
bin11010001111111000110100
3110221120201012
4122033320310
53230141240
6403251352
7112325462
oct32177064
913846635
106880820
11397a731
122379b58
13156bbbb
14cb1832
1590db65
hex68fe34

6880820 has 24 divisors (see below), whose sum is σ = 14553000. Its totient is φ = 2732672.

The previous prime is 6880807. The next prime is 6880837. The reversal of 6880820 is 280886.

6880820 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 550564 + 6330256 = 742^2 + 2516^2 .

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1826 + ... + 4134.

It is an arithmetic number, because the mean of its divisors is an integer number (606375).

Almost surely, 26880820 is an apocalyptic number.

It is an amenable number.

6880820 is an abundant number, since it is smaller than the sum of its proper divisors (7672180).

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

6880820 is a wasteful number, since it uses less digits than its factorization.

6880820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467 (or 2465 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 6880820 is about 2623.1317160981. The cubic root of 6880820 is about 190.2012641064.

The spelling of 6880820 in words is "six million, eight hundred eighty thousand, eight hundred twenty".

Divisors: 1 2 4 5 10 20 149 298 596 745 1490 2309 2980 4618 9236 11545 23090 46180 344041 688082 1376164 1720205 3440410 6880820