199507842 has 48 divisors (see below), whose sum is σ = 453293568. Its totient is φ = 63296640.

The previous prime is 199507769. The next prime is 199507859. The reversal of 199507842 is 248705991.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91242 + ... + 93402.

It is an arithmetic number, because the mean of its divisors is an integer number (9443616).

Almost surely, 2^199507842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199507842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226646784).

199507842 is an abundant number, since it is smaller than the sum of its proper divisors (253785726).

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

199507842 is a wasteful number, since it uses less digits than its factorization.

199507842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415 (or 2412 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 199507842 is about 14124.7244928883. The cubic root of 199507842 is about 584.3234607219.

The spelling of 199507842 in words is "one hundred ninety-nine million, five hundred seven thousand, eight hundred forty-two".