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28056167 = 431673907
BaseRepresentation
bin110101100000…
…1101001100111
31221210101211022
41223001221213
524140244132
62441201355
7460321256
oct153015147
957711738
1028056167
1114923017
12949025b
135a742a9
143a2479d
1526e2e12
hex1ac1a67

28056167 has 8 divisors (see below), whose sum is σ = 28887936. Its totient is φ = 27232632.

The previous prime is 28056143. The next prime is 28056187. The reversal of 28056167 is 76165082.

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 28056167 - 210 = 28055143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28056187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5228 + ... + 9134.

It is an arithmetic number, because the mean of its divisors is an integer number (3610992).

Almost surely, 228056167 is an apocalyptic number.

28056167 is a deficient number, since it is larger than the sum of its proper divisors (831769).

28056167 is a wasteful number, since it uses less digits than its factorization.

28056167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4117.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 28056167 is about 5296.8072458794. The cubic root of 28056167 is about 303.8618045406.

The spelling of 28056167 in words is "twenty-eight million, fifty-six thousand, one hundred sixty-seven".

Divisors: 1 43 167 3907 7181 168001 652469 28056167