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206880968 = 237191271531
BaseRepresentation
bin11000101010011…
…00000011001000
3112102021122100002
430111030003020
5410430142333
632310102132
75061313340
oct1425140310
9472248302
10206880968
11a6862808
125934a948
1333b26298
141d693d20
15132680e8
hexc54c0c8

206880968 has 64 divisors (see below), whose sum is σ = 470630400. Its totient is φ = 83280960.

The previous prime is 206880967. The next prime is 206880979. The reversal of 206880968 is 869088602.

206880968 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (206880967) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134363 + ... + 135893.

It is an arithmetic number, because the mean of its divisors is an integer number (7353600).

Almost surely, 2206880968 is an apocalyptic number.

206880968 is a gapful number since it is divisible by the number (28) 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 206880968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235315200).

206880968 is an abundant number, since it is smaller than the sum of its proper divisors (263749432).

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

206880968 is a wasteful number, since it uses less digits than its factorization.

206880968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690 (or 1686 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 206880968 is about 14383.3573271333. The cubic root of 206880968 is about 591.4347614955.

The spelling of 206880968 in words is "two hundred six million, eight hundred eighty thousand, nine hundred sixty-eight".

Divisors: 1 2 4 7 8 14 19 28 38 56 76 127 133 152 254 266 508 532 889 1016 1064 1531 1778 2413 3062 3556 4826 6124 7112 9652 10717 12248 16891 19304 21434 29089 33782 42868 58178 67564 85736 116356 135128 194437 203623 232712 388874 407246 777748 814492 1361059 1555496 1628984 2722118 3694303 5444236 7388606 10888472 14777212 25860121 29554424 51720242 103440484 206880968