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27905930 = 2513972213
BaseRepresentation
bin110101001110…
…0111110001010
31221111202201222
41222130332022
524120442210
62434042042
7456124253
oct152347612
957452658
1027905930
1114830158
129419322
135a20ab0
1439c5b2a
1526b3655
hex1a9cf8a

27905930 has 32 divisors (see below), whose sum is σ = 54676944. Its totient is φ = 10192896.

The previous prime is 27905903. The next prime is 27905963. The reversal of 27905930 is 3950972.

It can be written as a sum of positive squares in 8 ways, for example, as 15578809 + 12327121 = 3947^2 + 3511^2 .

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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11504 + ... + 13716.

Almost surely, 227905930 is an apocalyptic number.

27905930 is a deficient number, since it is larger than the sum of its proper divisors (26771014).

27905930 is a wasteful number, since it uses less digits than its factorization.

27905930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2330.

The product of its (nonzero) digits is 17010, while the sum is 35.

The square root of 27905930 is about 5282.6063642865. The cubic root of 27905930 is about 303.3184538314.

The spelling of 27905930 in words is "twenty-seven million, nine hundred five thousand, nine hundred thirty".

Divisors: 1 2 5 10 13 26 65 97 130 194 485 970 1261 2213 2522 4426 6305 11065 12610 22130 28769 57538 143845 214661 287690 429322 1073305 2146610 2790593 5581186 13952965 27905930