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128563148 = 22729158329
BaseRepresentation
bin1111010100110…
…11011111001100
322221220200111002
413222123133030
5230403010043
620431315432
73120524450
oct752333714
9287820432
10128563148
116663043a
123707bb78
132083478c
1413108660
15b447bb8
hex7a9b7cc

128563148 has 24 divisors (see below), whose sum is σ = 265994400. Its totient is φ = 53198208.

The previous prime is 128563133. The next prime is 128563157. The reversal of 128563148 is 841365821.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 78353 + ... + 79976.

It is an arithmetic number, because the mean of its divisors is an integer number (11083100).

Almost surely, 2128563148 is an apocalyptic number.

It is an amenable number.

128563148 is an abundant number, since it is smaller than the sum of its proper divisors (137431252).

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

128563148 is a wasteful number, since it uses less digits than its factorization.

128563148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158369 (or 158367 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 128563148 is about 11338.5690455189. The cubic root of 128563148 is about 504.7064241445.

The spelling of 128563148 in words is "one hundred twenty-eight million, five hundred sixty-three thousand, one hundred forty-eight".

Divisors: 1 2 4 7 14 28 29 58 116 203 406 812 158329 316658 633316 1108303 2216606 4433212 4591541 9183082 18366164 32140787 64281574 128563148