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228078071 = 13192633511
BaseRepresentation
bin11011001100000…
…11000111110111
3120220011120021222
431212003013313
5431341444241
634344300555
75436426434
oct1546030767
9526146258
10228078071
11107820481
126447175b
1338338550
1422410b8b
1515053a4b
hexd9831f7

228078071 has 16 divisors (see below), whose sum is σ = 259607040. Its totient is φ = 198637920.

The previous prime is 228078043. The next prime is 228078083. The reversal of 228078071 is 170870822.

It is not a de Polignac number, because 228078071 - 26 = 228078007 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228078271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63206 + ... + 66716.

It is an arithmetic number, because the mean of its divisors is an integer number (16225440).

Almost surely, 2228078071 is an apocalyptic number.

228078071 is a deficient number, since it is larger than the sum of its proper divisors (31528969).

228078071 is a wasteful number, since it uses less digits than its factorization.

228078071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3806.

The product of its (nonzero) digits is 12544, while the sum is 35.

The square root of 228078071 is about 15102.2538384176. The cubic root of 228078071 is about 610.9811952286.

The spelling of 228078071 in words is "two hundred twenty-eight million, seventy-eight thousand, seventy-one".

Divisors: 1 13 19 247 263 3419 3511 4997 45643 64961 66709 867217 923393 12004109 17544467 228078071