3991206976 has 63 divisors (see below), whose sum is σ = 8126845951. Its totient is φ = 1944809984.

The previous prime is 3991206929. The next prime is 3991207009. The reversal of 3991206976 is 6796021993.

The square root of 3991206976 is 63176.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 169000000 + 3822206976 = 13000^2 + 61824^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 26786550 + ... + 26786698.

Almost surely, 2^3991206976 is an apocalyptic number.

3991206976 is the 63176-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3991206976

3991206976 is an abundant number, since it is smaller than the sum of its proper divisors (4135638975).

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

3991206976 is an frugal number, since it uses more digits than its factorization.

3991206976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 52.

The cubic root of 3991206976 is about 1586.2370273141.

The spelling of 3991206976 in words is "three billion, nine hundred ninety-one million, two hundred six thousand, nine hundred seventy-six".