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28163083 = 1310871993
BaseRepresentation
bin110101101101…
…1110000001011
31221222211111011
41223123300023
524202204313
62443344351
7461245054
oct153336013
957884434
1028163083
1114996383
1295220b7
135ab0b60
143a5172b
15271493d
hex1adbc0b

28163083 has 8 divisors (see below), whose sum is σ = 30372608. Its totient is φ = 25959744.

The previous prime is 28163081. The next prime is 28163099. The reversal of 28163083 is 38036182.

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 28163083 - 21 = 28163081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28163081) 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, 13135 + ... + 15127.

It is an arithmetic number, because the mean of its divisors is an integer number (3796576).

Almost surely, 228163083 is an apocalyptic number.

28163083 is a deficient number, since it is larger than the sum of its proper divisors (2209525).

28163083 is a wasteful number, since it uses less digits than its factorization.

28163083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3093.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 28163083 is about 5306.8901439544. The cubic root of 28163083 is about 304.2472992043.

The spelling of 28163083 in words is "twenty-eight million, one hundred sixty-three thousand, eighty-three".

Divisors: 1 13 1087 1993 14131 25909 2166391 28163083