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130128292 = 2274647439
BaseRepresentation
bin1111100000110…
…01100110100100
3100001212012110101
413300121212210
5231303101132
620525033444
73140033530
oct760314644
9301765411
10130128292
11674aa348
12376b5884
1320c61cb8
14133d4bc0
15b6567e7
hex7c199a4

130128292 has 12 divisors (see below), whose sum is σ = 260256640. Its totient is φ = 55769256.

The previous prime is 130128259. The next prime is 130128329. The reversal of 130128292 is 292821031.

130128292 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 4647439 = 130128292 / (1 + 3 + 0 + 1 + 2 + 8 + 2 + 9 + 2).

It is a self number, because there is not a number n which added to its sum of digits gives 130128292.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2323692 + ... + 2323747.

Almost surely, 2130128292 is an apocalyptic number.

It is an amenable number.

130128292 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

130128292 is a wasteful number, since it uses less digits than its factorization.

130128292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4647450 (or 4647448 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 130128292 is about 11407.3788400316. The cubic root of 130128292 is about 506.7462884641.

The spelling of 130128292 in words is "one hundred thirty million, one hundred twenty-eight thousand, two hundred ninety-two".

Divisors: 1 2 4 7 14 28 4647439 9294878 18589756 32532073 65064146 130128292