188448399 has 12 divisors (see below), whose sum is σ = 275010736. Its totient is φ = 124336512.

The previous prime is 188448397. The next prime is 188448433. The reversal of 188448399 is 993844881.

It is not a de Polignac number, because 188448399 - 2¹ = 188448397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188448391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107059 + ... + 108804.

Almost surely, 2^188448399 is an apocalyptic number.

188448399 is a deficient number, since it is larger than the sum of its proper divisors (86562337).

188448399 is a wasteful number, since it uses less digits than its factorization.

188448399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215966 (or 215963 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 188448399 is about 13727.6508915400. The cubic root of 188448399 is about 573.3205172981.

The spelling of 188448399 in words is "one hundred eighty-eight million, four hundred forty-eight thousand, three hundred ninety-nine".