199940434 has 8 divisors (see below), whose sum is σ = 317552508. Its totient is φ = 94089600.

The previous prime is 199940423. The next prime is 199940467. The reversal of 199940434 is 434049991.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 177822225 + 22118209 = 13335^2 + 4703^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2940267 + ... + 2940334.

Almost surely, 2^199940434 is an apocalyptic number.

199940434 is a deficient number, since it is larger than the sum of its proper divisors (117612074).

199940434 is a wasteful number, since it uses less digits than its factorization.

199940434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5880620.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 199940434 is about 14140.0294907755. The cubic root of 199940434 is about 584.7454845310.

The spelling of 199940434 in words is "one hundred ninety-nine million, nine hundred forty thousand, four hundred thirty-four".