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27069381 = 323007709
BaseRepresentation
bin110011101000…
…0101111000101
31212221021012200
41213100233011
523412210011
62404105113
7446041323
oct147205705
955837180
1027069381
1114309699
129095199
1357ba0b1
143848d13
15259a856
hex19d0bc5

27069381 has 6 divisors (see below), whose sum is σ = 39100230. Its totient is φ = 18046248.

The previous prime is 27069347. The next prime is 27069431. The reversal of 27069381 is 18396072.

27069381 is a `hidden beast` number, since 270 + 6 + 9 + 381 = 666.

It can be written as a sum of positive squares in only one way, i.e., 20520900 + 6548481 = 4530^2 + 2559^2 .

It is not a de Polignac number, because 27069381 - 29 = 27068869 is a prime.

It is a super-2 number, since 2×270693812 = 1465502775446322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27069331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1503846 + ... + 1503863.

It is an arithmetic number, because the mean of its divisors is an integer number (6516705).

Almost surely, 227069381 is an apocalyptic number.

It is an amenable number.

27069381 is a deficient number, since it is larger than the sum of its proper divisors (12030849).

27069381 is a wasteful number, since it uses less digits than its factorization.

27069381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007715 (or 3007712 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 27069381 is about 5202.8243291505. The cubic root of 27069381 is about 300.2567468741.

The spelling of 27069381 in words is "twenty-seven million, sixty-nine thousand, three hundred eighty-one".

Divisors: 1 3 9 3007709 9023127 27069381