27472209 has 8 divisors (see below), whose sum is σ = 36709920. Its totient is φ = 18274656.

The previous prime is 27472177. The next prime is 27472217. The reversal of 27472209 is 90227472.

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

It is not a de Polignac number, because 27472209 - 2⁵ = 27472177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27472209.

It is not an unprimeable number, because it can be changed into a prime (27472219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8404 + ... + 11205.

It is an arithmetic number, because the mean of its divisors is an integer number (4588740).

Almost surely, 2^27472209 is an apocalyptic number.

27472209 is the 2802-nd nonagonal number.

It is an amenable number.

27472209 is a deficient number, since it is larger than the sum of its proper divisors (9237711).

27472209 is a wasteful number, since it uses less digits than its factorization.

27472209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20079.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 27472209 is about 5241.3938031787. The cubic root of 27472209 is about 301.7388243831.

The spelling of 27472209 in words is "twenty-seven million, four hundred seventy-two thousand, two hundred nine".