27964209 has 16 divisors (see below), whose sum is σ = 45890432. Its totient is φ = 14750208.

The previous prime is 27964199. The next prime is 27964241. The reversal of 27964209 is 90246972.

It is not a de Polignac number, because 27964209 - 2²⁰ = 26915633 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (27964109) 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 15 ways as a sum of consecutive naturals, for example, 50944 + ... + 51489.

It is an arithmetic number, because the mean of its divisors is an integer number (2868152).

Almost surely, 2^27964209 is an apocalyptic number.

It is an amenable number.

27964209 is a deficient number, since it is larger than the sum of its proper divisors (17926223).

27964209 is a wasteful number, since it uses less digits than its factorization.

27964209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102456.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 27964209 is about 5288.1196090860. The cubic root of 27964209 is about 303.5294580249.

The spelling of 27964209 in words is "twenty-seven million, nine hundred sixty-four thousand, two hundred nine".