27861065 has 8 divisors (see below), whose sum is σ = 33489288. Its totient is φ = 22251520.

The previous prime is 27861059. The next prime is 27861091. The reversal of 27861065 is 56016872.

It can be written as a sum of positive squares in 4 ways, for example, as 2085136 + 25775929 = 1444^2 + 5077^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27861065 - 2⁸ = 27860809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1142 + ... + 7551.

It is an arithmetic number, because the mean of its divisors is an integer number (4186161).

Almost surely, 2^27861065 is an apocalyptic number.

It is an amenable number.

27861065 is a deficient number, since it is larger than the sum of its proper divisors (5628223).

27861065 is an equidigital number, since it uses as much as digits as its factorization.

27861065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9339.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 27861065 is about 5278.3581727655. The cubic root of 27861065 is about 303.1558159765.

The spelling of 27861065 in words is "twenty-seven million, eight hundred sixty-one thousand, sixty-five".