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28129153 = 138392579
BaseRepresentation
bin110101101001…
…1011110000001
31221221002221111
41223103132001
524200113103
62442523321
7461044123
oct153233601
957832844
1028129153
1114972938
129506541
135a9b590
143a43213
15270986d
hex1ad3781

28129153 has 8 divisors (see below), whose sum is σ = 30340800. Its totient is φ = 25924368.

The previous prime is 28129151. The next prime is 28129187. The reversal of 28129153 is 35192182.

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 28129153 - 21 = 28129151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28129151) 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, 9618 + ... + 12196.

It is an arithmetic number, because the mean of its divisors is an integer number (3792600).

Almost surely, 228129153 is an apocalyptic number.

It is an amenable number.

28129153 is a deficient number, since it is larger than the sum of its proper divisors (2211647).

28129153 is a wasteful number, since it uses less digits than its factorization.

28129153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3431.

The product of its digits is 4320, while the sum is 31.

The square root of 28129153 is about 5303.6923930409. The cubic root of 28129153 is about 304.1250675663.

It can be divided in two parts, 28129 and 153, that added together give a palindrome (28282).

The spelling of 28129153 in words is "twenty-eight million, one hundred twenty-nine thousand, one hundred fifty-three".

Divisors: 1 13 839 2579 10907 33527 2163781 28129153