199457908 has 24 divisors (see below), whose sum is σ = 384647648. Its totient is φ = 89915616.

The previous prime is 199457891. The next prime is 199457917. The reversal of 199457908 is 809754991.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42366 + ... + 46837.

Almost surely, 2^199457908 is an apocalyptic number.

It is an amenable number.

199457908 is a deficient number, since it is larger than the sum of its proper divisors (185189740).

199457908 is a wasteful number, since it uses less digits than its factorization.

199457908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89263 (or 89261 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 52.

The square root of 199457908 is about 14122.9567725742. The cubic root of 199457908 is about 584.2747073463.

The spelling of 199457908 in words is "one hundred ninety-nine million, four hundred fifty-seven thousand, nine hundred eight".