199928408 has 32 divisors (see below), whose sum is σ = 381447360. Its totient is φ = 98222880.

The previous prime is 199928387. The next prime is 199928419. The reversal of 199928408 is 804829991.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139391 + ... + 140817.

It is an arithmetic number, because the mean of its divisors is an integer number (11920230).

Almost surely, 2^199928408 is an apocalyptic number.

It is an amenable number.

199928408 is a deficient number, since it is larger than the sum of its proper divisors (181518952).

199928408 is a wasteful number, since it uses less digits than its factorization.

199928408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1727 (or 1723 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 50.

The square root of 199928408 is about 14139.6042377430. The cubic root of 199928408 is about 584.7337605556.

The spelling of 199928408 in words is "one hundred ninety-nine million, nine hundred twenty-eight thousand, four hundred eight".