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28082655 = 3252343631
BaseRepresentation
bin110101100100…
…0000111011111
31221211202011100
41223020013133
524142121110
62441524143
7460461426
oct153100737
957752140
1028082655
1114940a07
1294a3653
135a83373
143a302bd
1526eabc0
hex1ac81df

28082655 has 48 divisors (see below), whose sum is σ = 52056576. Its totient is φ = 13970880.

The previous prime is 28082653. The next prime is 28082669. The reversal of 28082655 is 55628082.

It is not a de Polignac number, because 28082655 - 21 = 28082653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28082653) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44190 + ... + 44820.

It is an arithmetic number, because the mean of its divisors is an integer number (1084512).

Almost surely, 228082655 is an apocalyptic number.

28082655 is a deficient number, since it is larger than the sum of its proper divisors (23973921).

28082655 is a wasteful number, since it uses less digits than its factorization.

28082655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 28082655 is about 5299.3070301691. The cubic root of 28082655 is about 303.9574003962.

The spelling of 28082655 in words is "twenty-eight million, eighty-two thousand, six hundred fifty-five".

Divisors: 1 3 5 9 15 23 43 45 69 115 129 207 215 345 387 631 645 989 1035 1893 1935 2967 3155 4945 5679 8901 9465 14513 14835 27133 28395 43539 44505 72565 81399 130617 135665 217695 244197 406995 624059 653085 1220985 1872177 3120295 5616531 9360885 28082655