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28003400 = 2352163859
BaseRepresentation
bin110101011010…
…0110001001000
31221200201102222
41222310301020
524132102100
62440113212
7460011365
oct152646110
957621388
1028003400
1114897407
129465808
135a56279
143a0d46c
1526d2485
hex1ab4c48

28003400 has 48 divisors (see below), whose sum is σ = 65583600. Its totient is φ = 11119680.

The previous prime is 28003343. The next prime is 28003421. The reversal of 28003400 is 430082.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32171 + ... + 33029.

It is an arithmetic number, because the mean of its divisors is an integer number (1366325).

Almost surely, 228003400 is an apocalyptic number.

28003400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28003400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32791800).

28003400 is an abundant number, since it is smaller than the sum of its proper divisors (37580200).

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

28003400 is a wasteful number, since it uses less digits than its factorization.

28003400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038 (or 1029 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 28003400 is about 5291.8238821790. The cubic root of 28003400 is about 303.6711876455.

Adding to 28003400 its reverse (430082), we get a palindrome (28433482).

The spelling of 28003400 in words is "twenty-eight million, three thousand, four hundred".

Divisors: 1 2 4 5 8 10 20 25 40 50 100 163 200 326 652 815 859 1304 1630 1718 3260 3436 4075 4295 6520 6872 8150 8590 16300 17180 21475 32600 34360 42950 85900 140017 171800 280034 560068 700085 1120136 1400170 2800340 3500425 5600680 7000850 14001700 28003400