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128930375 = 537295081
BaseRepresentation
bin1111010111101…
…01001001000111
322222121100020002
413223311021013
5231001233000
620443231515
73123614210
oct753651107
9288540202
10128930375
1166861332
123721859b
1320932982
14131a2407
15b4bb8d5
hex7af5247

128930375 has 32 divisors (see below), whose sum is σ = 190270080. Its totient is φ = 85344000.

The previous prime is 128930339. The next prime is 128930377. The reversal of 128930375 is 573039821.

It is not a de Polignac number, because 128930375 - 28 = 128930119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128930377) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22835 + ... + 27915.

It is an arithmetic number, because the mean of its divisors is an integer number (5945940).

Almost surely, 2128930375 is an apocalyptic number.

128930375 is a deficient number, since it is larger than the sum of its proper divisors (61339705).

128930375 is an equidigital number, since it uses as much as digits as its factorization.

128930375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5132 (or 5122 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 128930375 is about 11354.7512081947. The cubic root of 128930375 is about 505.1865141201.

The spelling of 128930375 in words is "one hundred twenty-eight million, nine hundred thirty thousand, three hundred seventy-five".

Divisors: 1 5 7 25 29 35 125 145 175 203 725 875 1015 3625 5075 5081 25375 25405 35567 127025 147349 177835 635125 736745 889175 1031443 3683725 4445875 5157215 18418625 25786075 128930375