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128468055 = 358564537
BaseRepresentation
bin1111010100001…
…00010001010111
322221201212001010
413222010101113
5230341434210
620425303303
73116650302
oct752042127
9287655033
10128468055
1166575a51
1237034b33
1320800401
14130c1b39
15b429920
hex7a84457

128468055 has 8 divisors (see below), whose sum is σ = 205548912. Its totient is φ = 68516288.

The previous prime is 128468023. The next prime is 128468059. The reversal of 128468055 is 550864821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128468055 - 25 = 128468023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128468059) 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 7 ways as a sum of consecutive naturals, for example, 4282254 + ... + 4282283.

It is an arithmetic number, because the mean of its divisors is an integer number (25693614).

Almost surely, 2128468055 is an apocalyptic number.

128468055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128468055 is a deficient number, since it is larger than the sum of its proper divisors (77080857).

128468055 is an equidigital number, since it uses as much as digits as its factorization.

128468055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8564545.

The product of its (nonzero) digits is 76800, while the sum is 39.

The square root of 128468055 is about 11334.3749276261. The cubic root of 128468055 is about 504.5819564239.

The spelling of 128468055 in words is "one hundred twenty-eight million, four hundred sixty-eight thousand, fifty-five".

Divisors: 1 3 5 15 8564537 25693611 42822685 128468055