3996644986 has 16 divisors (see below), whose sum is σ = 6172384680. Its totient is φ = 1939678720.

The previous prime is 3996644969. The next prime is 3996644999. The reversal of 3996644986 is 6894466993.

It can be written as a sum of positive squares in 4 ways, for example, as 3996641961 + 3025 = 63219^2 + 55^2 .

It is a super-2 number, since 2×3996644986² = 31946342288237880392, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107551 + ... + 139858.

Almost surely, 2^3996644986 is an apocalyptic number.

3996644986 is a deficient number, since it is larger than the sum of its proper divisors (2175739694).

3996644986 is a wasteful number, since it uses less digits than its factorization.

3996644986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247649.

The product of its digits is 60466176, while the sum is 64.

The square root of 3996644986 is about 63219.0239247649. The cubic root of 3996644986 is about 1586.9571150978.

The spelling of 3996644986 in words is "three billion, nine hundred ninety-six million, six hundred forty-four thousand, nine hundred eighty-six".