27965641 has 8 divisors (see below), whose sum is σ = 30761568. Its totient is φ = 25422100.

The previous prime is 27965621. The next prime is 27965659. The reversal of 27965641 is 14656972.

It is not a de Polignac number, because 27965641 - 2⁹ = 27965129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27965594 and 27965603.

It is not an unprimeable number, because it can be changed into a prime (27965621) 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 7 ways as a sum of consecutive naturals, for example, 9175 + ... + 11836.

It is an arithmetic number, because the mean of its divisors is an integer number (3845196).

Almost surely, 2^27965641 is an apocalyptic number.

It is an amenable number.

27965641 is a deficient number, since it is larger than the sum of its proper divisors (2795927).

27965641 is an equidigital number, since it uses as much as digits as its factorization.

27965641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21044 (or 21022 counting only the distinct ones).

The product of its digits is 90720, while the sum is 40.

The square root of 27965641 is about 5288.2550051978. The cubic root of 27965641 is about 303.5346390138.

The spelling of 27965641 in words is "twenty-seven million, nine hundred sixty-five thousand, six hundred forty-one".