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228960165 = 357171943157
BaseRepresentation
bin11011010010110…
…10011110100101
3120221211101022010
431221122132211
5432103211130
634415224433
75450062230
oct1551323645
9527741263
10228960165
11108273185
1264818119
1338586bb5
14225a0417
151517a0b0
hexda5a7a5

228960165 has 128 divisors (see below), whose sum is σ = 480522240. Its totient is φ = 90574848.

The previous prime is 228960163. The next prime is 228960169. The reversal of 228960165 is 561069822.

It is not a de Polignac number, because 228960165 - 21 = 228960163 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228960163) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1458267 + ... + 1458423.

It is an arithmetic number, because the mean of its divisors is an integer number (3754080).

Almost surely, 2228960165 is an apocalyptic number.

It is an amenable number.

228960165 is an abundant number, since it is smaller than the sum of its proper divisors (251562075).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

228960165 is a wasteful number, since it uses less digits than its factorization.

228960165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 228960165 is about 15131.4297077309. The cubic root of 228960165 is about 611.7678404101.

The spelling of 228960165 in words is "two hundred twenty-eight million, nine hundred sixty thousand, one hundred sixty-five".

Divisors: 1 3 5 7 15 17 19 21 35 43 51 57 85 95 105 119 129 133 157 215 255 285 301 323 357 399 471 595 645 665 731 785 817 903 969 1099 1505 1615 1785 1995 2193 2261 2355 2451 2669 2983 3297 3655 4085 4515 4845 5117 5495 5719 6751 6783 8007 8949 10965 11305 12255 13345 13889 14915 15351 16485 17157 18683 20253 20881 25585 28595 33755 33915 40035 41667 44745 47257 50711 56049 62643 69445 76755 85785 93415 97223 101265 104405 114767 128269 141771 152133 208335 236285 253555 280245 291669 313215 344301 354977 384807 486115 573835 641345 708855 760665 803369 897883 1064931 1458345 1721505 1774885 1924035 2180573 2410107 2693649 4016845 4489415 5324655 6541719 10902865 12050535 13468245 15264011 32708595 45792033 76320055 228960165