199779996 has 96 divisors (see below), whose sum is σ = 524339200. Its totient is φ = 58786560.

The previous prime is 199779989. The next prime is 199780037. The reversal of 199779996 is 699977991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 526935 + ... + 527313.

Almost surely, 2^199779996 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199779996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (262169600).

199779996 is an abundant number, since it is smaller than the sum of its proper divisors (324559204).

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

199779996 is a wasteful number, since it uses less digits than its factorization.

199779996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 537 counting only the distinct ones).

The product of its digits is 17360406, while the sum is 66.

The square root of 199779996 is about 14134.3551674634. The cubic root of 199779996 is about 584.5890371019.

The spelling of 199779996 in words is "one hundred ninety-nine million, seven hundred seventy-nine thousand, nine hundred ninety-six".