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128346642 = 23219935831
BaseRepresentation
bin1111010011001…
…10101000010010
322221111200111100
413221212220102
5230324043032
620422525230
73115633314
oct751465022
9287450440
10128346642
11664a2806
1236b96816
132078a078
141308d7b4
15b40397c
hex7a66a12

128346642 has 24 divisors (see below), whose sum is σ = 279489600. Its totient is φ = 42566040.

The previous prime is 128346641. The next prime is 128346649. The reversal of 128346642 is 246643821.

128346642 is a `hidden beast` number, since 1 + 2 + 8 + 3 + 4 + 6 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 128346597 and 128346606.

It is not an unprimeable number, because it can be changed into a prime (128346641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14334 + ... + 21497.

It is an arithmetic number, because the mean of its divisors is an integer number (11645400).

Almost surely, 2128346642 is an apocalyptic number.

128346642 is an abundant number, since it is smaller than the sum of its proper divisors (151142958).

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

128346642 is a wasteful number, since it uses less digits than its factorization.

128346642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36038 (or 36035 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 128346642 is about 11329.0176979295. The cubic root of 128346642 is about 504.4229490123.

The spelling of 128346642 in words is "one hundred twenty-eight million, three hundred forty-six thousand, six hundred forty-two".

Divisors: 1 2 3 6 9 18 199 398 597 1194 1791 3582 35831 71662 107493 214986 322479 644958 7130369 14260738 21391107 42782214 64173321 128346642