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28110828 = 2238926321
BaseRepresentation
bin110101100111…
…0111111101100
31221220011210210
41223032333230
524144021303
62442302420
7460636524
oct153167754
957804723
1028110828
1114960099
1294b7a10
135a93135
143a3a684
152704203
hex1acefec

28110828 has 24 divisors (see below), whose sum is σ = 66331440. Its totient is φ = 9264640.

The previous prime is 28110827. The next prime is 28110833. The reversal of 28110828 is 82801182.

It is a junction number, because it is equal to n+sod(n) for n = 28110795 and 28110804.

It is not an unprimeable number, because it can be changed into a prime (28110827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12093 + ... + 14228.

It is an arithmetic number, because the mean of its divisors is an integer number (2763810).

Almost surely, 228110828 is an apocalyptic number.

It is an amenable number.

28110828 is an abundant number, since it is smaller than the sum of its proper divisors (38220612).

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

28110828 is a wasteful number, since it uses less digits than its factorization.

28110828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26417 (or 26415 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 28110828 is about 5301.9645415638. The cubic root of 28110828 is about 304.0590115127.

The spelling of 28110828 in words is "twenty-eight million, one hundred ten thousand, eight hundred twenty-eight".

Divisors: 1 2 3 4 6 12 89 178 267 356 534 1068 26321 52642 78963 105284 157926 315852 2342569 4685138 7027707 9370276 14055414 28110828