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128548130 = 251272797
BaseRepresentation
bin1111010100101…
…11110100100010
322221212220212212
413222113310202
5230402020010
620431122122
73120432614
oct752276442
9287786785
10128548130
1166620127
1237073342
132082a9a9
1413102db4
15b443505
hex7a97d22

128548130 has 24 divisors (see below), whose sum is σ = 233515548. Its totient is φ = 50950368.

The previous prime is 128548093. The next prime is 128548139. The reversal of 128548130 is 31845821.

It can be written as a sum of positive squares in 2 ways, for example, as 127757809 + 790321 = 11303^2 + 889^2 .

It is not an unprimeable number, because it can be changed into a prime (128548139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160892 + ... + 161688.

Almost surely, 2128548130 is an apocalyptic number.

128548130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128548130 is a deficient number, since it is larger than the sum of its proper divisors (104967418).

128548130 is an equidigital number, since it uses as much as digits as its factorization.

128548130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058 (or 931 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 128548130 is about 11337.9067732981. The cubic root of 128548130 is about 504.6867710885.

The spelling of 128548130 in words is "one hundred twenty-eight million, five hundred forty-eight thousand, one hundred thirty".

Divisors: 1 2 5 10 127 254 635 797 1270 1594 3985 7970 16129 32258 80645 101219 161290 202438 506095 1012190 12854813 25709626 64274065 128548130