199079442 has 24 divisors (see below), whose sum is σ = 431911116. Its totient is φ = 66271776.

The previous prime is 199079437. The next prime is 199079443. The reversal of 199079442 is 244970991.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 185749641 + 13329801 = 13629^2 + 3651^2 .

It is not an unprimeable number, because it can be changed into a prime (199079443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7408 + ... + 21284.

Almost surely, 2^199079442 is an apocalyptic number.

199079442 is an abundant number, since it is smaller than the sum of its proper divisors (232831674).

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

199079442 is a wasteful number, since it uses less digits than its factorization.

199079442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14682 (or 14679 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 199079442 is about 14109.5514457406. The cubic root of 199079442 is about 583.9049248648.

The spelling of 199079442 in words is "one hundred ninety-nine million, seventy-nine thousand, four hundred forty-two".