199648449 has 128 divisors (see below), whose sum is σ = 406425600. Its totient is φ = 93519360.

The previous prime is 199648429. The next prime is 199648453. The reversal of 199648449 is 944846991.

It is a happy number.

199648449 is a `hidden beast` number, since 199 + 6 + 4 + 8 + 449 = 666.

199648449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 199648449 - 2⁷ = 199648321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199648395 and 199648404.

It is not an unprimeable number, because it can be changed into a prime (199648429) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2243197 + ... + 2243285.

It is an arithmetic number, because the mean of its divisors is an integer number (3175200).

Almost surely, 2^199648449 is an apocalyptic number.

199648449 is the 7553-rd nonagonal number.

It is an amenable number.

199648449 is an abundant number, since it is smaller than the sum of its proper divisors (206777151).

199648449 is a wasteful number, since it uses less digits than its factorization.

199648449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 206 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 54.

The square root of 199648449 is about 14129.7009522495. The cubic root of 199648449 is about 584.4606995631.

The spelling of 199648449 in words is "one hundred ninety-nine million, six hundred forty-eight thousand, four hundred forty-nine".