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128808484 = 2277164793
BaseRepresentation
bin1111010110101…
…11011000100100
322222101011000121
413223113120210
5230433332414
620440451324
73122565640
oct753273044
9288334017
10128808484
11667887a2
1237179b44
13208bc34c
141316dc20
15b495724
hex7ad7624

128808484 has 24 divisors (see below), whose sum is σ = 261249408. Its totient is φ = 54425280.

The previous prime is 128808479. The next prime is 128808499. The reversal of 128808484 is 484808821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 128808484.

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, 30409 + ... + 34384.

It is an arithmetic number, because the mean of its divisors is an integer number (10885392).

Almost surely, 2128808484 is an apocalyptic number.

128808484 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

128808484 is an abundant number, since it is smaller than the sum of its proper divisors (132440924).

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

128808484 is a wasteful number, since it uses less digits than its factorization.

128808484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64875 (or 64873 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 43.

The square root of 128808484 is about 11349.3825382705. The cubic root of 128808484 is about 505.0272625219.

The spelling of 128808484 in words is "one hundred twenty-eight million, eight hundred eight thousand, four hundred eighty-four".

Divisors: 1 2 4 7 14 28 71 142 284 497 994 1988 64793 129586 259172 453551 907102 1814204 4600303 9200606 18401212 32202121 64404242 128808484