188448009 has 8 divisors (see below), whose sum is σ = 266044320. Its totient is φ = 118241856.

The previous prime is 188447939. The next prime is 188448017. The reversal of 188448009 is 900844881.

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

It is not a de Polignac number, because 188448009 - 2⁷ = 188447881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (188448089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1847479 + ... + 1847580.

It is an arithmetic number, because the mean of its divisors is an integer number (33255540).

Almost surely, 2^188448009 is an apocalyptic number.

It is an amenable number.

188448009 is a deficient number, since it is larger than the sum of its proper divisors (77596311).

188448009 is a wasteful number, since it uses less digits than its factorization.

188448009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3695079.

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 188448009 is about 13727.6366866260. The cubic root of 188448009 is about 573.3201217961.

The spelling of 188448009 in words is "one hundred eighty-eight million, four hundred forty-eight thousand, nine".