27961165 has 8 divisors (see below), whose sum is σ = 33698808. Its totient is φ = 22272000.

The previous prime is 27961121. The next prime is 27961187. The reversal of 27961165 is 56116972.

It can be written as a sum of positive squares in 4 ways, for example, as 51076 + 27910089 = 226^2 + 5283^2 .

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

It is not a de Polignac number, because 27961165 - 2¹³ = 27952973 is a prime.

It is a Duffinian number.

It is a congruent 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, 10836 + ... + 13165.

It is an arithmetic number, because the mean of its divisors is an integer number (4212351).

Almost surely, 2^27961165 is an apocalyptic number.

It is an amenable number.

27961165 is a deficient number, since it is larger than the sum of its proper divisors (5737643).

27961165 is a wasteful number, since it uses less digits than its factorization.

27961165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24239.

The product of its digits is 22680, while the sum is 37.

The square root of 27961165 is about 5287.8317862806. The cubic root of 27961165 is about 303.5184442180.

The spelling of 27961165 in words is "twenty-seven million, nine hundred sixty-one thousand, one hundred sixty-five".