27641145 has 24 divisors (see below), whose sum is σ = 51447744. Its totient is φ = 12635616.

The previous prime is 27641129. The next prime is 27641153. The reversal of 27641145 is 54114672.

It is not a de Polignac number, because 27641145 - 2⁴ = 27641129 is a prime.

It is a super-2 number, since 2×27641145² = 1528065793822050, which contains 22 as substring.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 18069 + ... + 19538.

It is an arithmetic number, because the mean of its divisors is an integer number (2143656).

Almost surely, 2^27641145 is an apocalyptic number.

It is an amenable number.

27641145 is a deficient number, since it is larger than the sum of its proper divisors (23806599).

27641145 is a wasteful number, since it uses less digits than its factorization.

27641145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37629 (or 37622 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 27641145 is about 5257.4846647423. The cubic root of 27641145 is about 302.3560592876.

The spelling of 27641145 in words is "twenty-seven million, six hundred forty-one thousand, one hundred forty-five".