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28916159 = 34338423
BaseRepresentation
bin110111001001…
…1100110111111
32000102002111212
41232103212333
524400304114
62511435035
7500532446
oct156234677
960362455
1028916159
1115360158
129825a7b
135cb586c
143ba9d5d
152812b3e
hex1b939bf

28916159 has 4 divisors (see below), whose sum is σ = 28928016. Its totient is φ = 28904304.

The previous prime is 28916143. The next prime is 28916177. The reversal of 28916159 is 95161982.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28916159 - 24 = 28916143 is a prime.

It is a super-2 number, since 2×289161592 = 1672288502626562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28916659) 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 3 ways as a sum of consecutive naturals, for example, 779 + ... + 7644.

It is an arithmetic number, because the mean of its divisors is an integer number (7232004).

Almost surely, 228916159 is an apocalyptic number.

28916159 is a deficient number, since it is larger than the sum of its proper divisors (11857).

28916159 is an equidigital number, since it uses as much as digits as its factorization.

28916159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11856.

The product of its digits is 38880, while the sum is 41.

The square root of 28916159 is about 5377.3747312234. The cubic root of 28916159 is about 306.9353207898.

The spelling of 28916159 in words is "twenty-eight million, nine hundred sixteen thousand, one hundred fifty-nine".

Divisors: 1 3433 8423 28916159