199051938 has 32 divisors (see below), whose sum is σ = 444830400. Its totient is φ = 65976768.

The previous prime is 199051933. The next prime is 199051949. The reversal of 199051938 is 839150991.

199051938 is a `hidden beast` number, since 19 + 90 + 519 + 38 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 199051893 and 199051902.

It is not an unprimeable number, because it can be changed into a prime (199051933) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 631 + ... + 19962.

It is an arithmetic number, because the mean of its divisors is an integer number (13900950).

Almost surely, 2^199051938 is an apocalyptic number.

199051938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

199051938 is an abundant number, since it is smaller than the sum of its proper divisors (245778462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199051938 is a wasteful number, since it uses less digits than its factorization.

199051938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20783 (or 20777 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 45.

The square root of 199051938 is about 14108.5767531668. The cubic root of 199051938 is about 583.8780336557.

The spelling of 199051938 in words is "one hundred ninety-nine million, fifty-one thousand, nine hundred thirty-eight".