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6813180 = 22335113137
BaseRepresentation
bin11001111111010111111100
3110211010221000
4121333113330
53221010210
6402010300
7111624333
oct31772774
913733830
106813180
113933930
122346990
13154718a
14c94d1a
158e8ac0
hex67f5fc

6813180 has 192 divisors, whose sum is σ = 24514560. Its totient is φ = 1555200.

The previous prime is 6813139. The next prime is 6813181. The reversal of 6813180 is 813186.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6813181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 184122 + ... + 184158.

It is an arithmetic number, because the mean of its divisors is an integer number (127680).

Almost surely, 26813180 is an apocalyptic number.

6813180 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6813180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12257280).

6813180 is an abundant number, since it is smaller than the sum of its proper divisors (17701380).

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

6813180 is a wasteful number, since it uses less digits than its factorization.

6813180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 6813180 is about 2610.2068883520. The cubic root of 6813180 is about 189.5759703563.

The spelling of 6813180 in words is "six million, eight hundred thirteen thousand, one hundred eighty".