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128148366 = 23173123457
BaseRepresentation
bin1111010001101…
…10001110001110
322221010121111210
413220312032032
5230301221431
620414355250
73114146253
oct750661616
9287117453
10128148366
1166377845
1236abbb26
132071aa48
141303b42a
15b3b4d46
hex7a3638e

128148366 has 16 divisors (see below), whose sum is σ = 257780304. Its totient is φ = 42468864.

The previous prime is 128148359. The next prime is 128148379. The reversal of 128148366 is 663841821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60691 + ... + 62766.

It is an arithmetic number, because the mean of its divisors is an integer number (16111269).

Almost surely, 2128148366 is an apocalyptic number.

128148366 is an abundant number, since it is smaller than the sum of its proper divisors (129631938).

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

128148366 is a wasteful number, since it uses less digits than its factorization.

128148366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123635.

The product of its digits is 55296, while the sum is 39.

The square root of 128148366 is about 11320.2635128340. The cubic root of 128148366 is about 504.1630629466.

The spelling of 128148366 in words is "one hundred twenty-eight million, one hundred forty-eight thousand, three hundred sixty-six".

Divisors: 1 2 3 6 173 346 519 1038 123457 246914 370371 740742 21358061 42716122 64074183 128148366