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128345106 = 23231974721
BaseRepresentation
bin1111010011001…
…10010000010010
322221111121101110
413221212100102
5230324020411
620422514150
73115625661
oct751462022
9287447343
10128345106
11664a163a
1236b95956
1320789466
141308cdd8
15b4032a6
hex7a66412

128345106 has 32 divisors (see below), whose sum is σ = 269267328. Its totient is φ = 40705280.

The previous prime is 128345101. The next prime is 128345123. The reversal of 128345106 is 601543821.

It is not an unprimeable number, because it can be changed into a prime (128345101) 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, 24826 + ... + 29546.

It is an arithmetic number, because the mean of its divisors is an integer number (8414604).

Almost surely, 2128345106 is an apocalyptic number.

128345106 is an abundant number, since it is smaller than the sum of its proper divisors (140922222).

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

128345106 is a wasteful number, since it uses less digits than its factorization.

128345106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4946.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 128345106 is about 11328.9499072068. The cubic root of 128345106 is about 504.4209367619.

Adding to 128345106 its reverse (601543821), we get a palindrome (729888927).

The spelling of 128345106 in words is "one hundred twenty-eight million, three hundred forty-five thousand, one hundred six".

Divisors: 1 2 3 6 23 46 69 138 197 394 591 1182 4531 4721 9062 9442 13593 14163 27186 28326 108583 217166 325749 651498 930037 1860074 2790111 5580222 21390851 42781702 64172553 128345106