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28484141 = 722692161
BaseRepresentation
bin110110010101…
…0001000101101
31222121010220012
41230222020231
524242443031
62454303005
7464053100
oct154521055
958533805
1028484141
1115095614
129657a65
135b9402a
143ad6737
152779b2b
hex1b2a22d

28484141 has 12 divisors (see below), whose sum is σ = 33273180. Its totient is φ = 24312960.

The previous prime is 28484123. The next prime is 28484153. The reversal of 28484141 is 14148482.

It can be written as a sum of positive squares in 2 ways, for example, as 8726116 + 19758025 = 2954^2 + 4445^2 .

It is not a de Polignac number, because 28484141 - 26 = 28484077 is a prime.

It is a super-2 number, since 2×284841412 = 1622692577015762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28484098 and 28484107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28484101) 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, 12101 + ... + 14261.

It is an arithmetic number, because the mean of its divisors is an integer number (2772765).

Almost surely, 228484141 is an apocalyptic number.

It is an amenable number.

28484141 is a deficient number, since it is larger than the sum of its proper divisors (4789039).

28484141 is a wasteful number, since it uses less digits than its factorization.

28484141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2444 (or 2437 counting only the distinct ones).

The product of its digits is 8192, while the sum is 32.

The square root of 28484141 is about 5337.0535878891. The cubic root of 28484141 is about 305.3990691286.

The spelling of 28484141 in words is "twenty-eight million, four hundred eighty-four thousand, one hundred forty-one".

Divisors: 1 7 49 269 1883 2161 13181 15127 105889 581309 4069163 28484141