3947223244644 has 27 divisors (see below), whose sum is σ = 9977733334387. Its totient is φ = 1315737108024.

The previous prime is 3947223244631. The next prime is 3947223244649. The reversal of 3947223244644 is 4464423227493.

The square root of 3947223244644 is 1986762.

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

3947223244644 is a `hidden beast` number, since 3 + 94 + 72 + 2 + 3 + 2 + 446 + 44 = 666.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3947223244649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11755009 + ... + 12086135.

Almost surely, 2^{3947223244644} is an apocalyptic number.

3947223244644 is the 1986762-nd square number.

It is an amenable number.

3947223244644 is an abundant number, since it is smaller than the sum of its proper divisors (6030510089743).

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

3947223244644 is an frugal number, since it uses more digits than its factorization.

3947223244644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662264 (or 331132 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 54.

The spelling of 3947223244644 in words is "three trillion, nine hundred forty-seven billion, two hundred twenty-three million, two hundred forty-four thousand, six hundred forty-four".