3991200650 has 12 divisors (see below), whose sum is σ = 7423633302. Its totient is φ = 1596480240.

The previous prime is 3991200607. The next prime is 3991200683. The reversal of 3991200650 is 560021993.

It can be written as a sum of positive squares in 3 ways, for example, as 2255395081 + 1735805569 = 47491^2 + 41663^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 3991200650.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39911957 + ... + 39912056.

Almost surely, 2^3991200650 is an apocalyptic number.

3991200650 is a deficient number, since it is larger than the sum of its proper divisors (3432432652).

3991200650 is a wasteful number, since it uses less digits than its factorization.

3991200650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79824025 (or 79824020 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 3991200650 is about 63175.9499334992. The cubic root of 3991200650 is about 1586.2361892601.

The spelling of 3991200650 in words is "three billion, nine hundred ninety-one million, two hundred thousand, six hundred fifty".