3921960395236 has 81 divisors (see below), whose sum is σ = 7565960555433. Its totient is φ = 1778076948960.

The previous prime is 3921960395219. The next prime is 3921960395263. The reversal of 3921960395236 is 6325930691293.

It is a happy number.

The square root of 3921960395236 is 1980394.

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

It can be written as a sum of positive squares in only one way, i.e., 580171656100 + 3341788739136 = 761690^2 + 1828056^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3037923751 + ... + 3037925041.

Almost surely, 2^{3921960395236} is an apocalyptic number.

3921960395236 is the 1980394-th square number.

It is an amenable number.

3921960395236 is a deficient number, since it is larger than the sum of its proper divisors (3644000160197).

3921960395236 is an equidigital number, since it uses as much as digits as its factorization.

3921960395236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730 (or 1365 counting only the distinct ones).

The product of its (nonzero) digits is 14171760, while the sum is 58.

The spelling of 3921960395236 in words is "three trillion, nine hundred twenty-one billion, nine hundred sixty million, three hundred ninety-five thousand, two hundred thirty-six".