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28006867 = 718672143
BaseRepresentation
bin110101011010…
…1100111010011
31221200220012101
41222311213103
524132204432
62440141231
7460024450
oct152654723
957626171
1028006867
1114899a79
129467817
135a57a15
143a10827
1526d34e7
hex1ab59d3

28006867 has 8 divisors (see below), whose sum is σ = 32039936. Its totient is φ = 23981832.

The previous prime is 28006859. The next prime is 28006879. The reversal of 28006867 is 76860082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28006867 - 23 = 28006859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28006897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11998 + ... + 14140.

It is an arithmetic number, because the mean of its divisors is an integer number (4004992).

Almost surely, 228006867 is an apocalyptic number.

28006867 is a deficient number, since it is larger than the sum of its proper divisors (4033069).

28006867 is a wasteful number, since it uses less digits than its factorization.

28006867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4017.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 28006867 is about 5292.1514528592. The cubic root of 28006867 is about 303.6837192733.

The spelling of 28006867 in words is "twenty-eight million, six thousand, eight hundred sixty-seven".

Divisors: 1 7 1867 2143 13069 15001 4000981 28006867