3947837445 has 48 divisors (see below), whose sum is σ = 7160604672. Its totient is φ = 2009629440.

The previous prime is 3947837357. The next prime is 3947837477. The reversal of 3947837445 is 5447387493.

3947837445 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3947837445 - 2⁹ = 3947836933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3947837391 and 3947837400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82452 + ... + 121218.

It is an arithmetic number, because the mean of its divisors is an integer number (149179264).

Almost surely, 2^3947837445 is an apocalyptic number.

It is an amenable number.

3947837445 is a deficient number, since it is larger than the sum of its proper divisors (3212767227).

3947837445 is a wasteful number, since it uses less digits than its factorization.

3947837445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38882 (or 38879 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 54.

The square root of 3947837445 is about 62831.8187306400. The cubic root of 3947837445 is about 1580.4705970154.

The spelling of 3947837445 in words is "three billion, nine hundred forty-seven million, eight hundred thirty-seven thousand, four hundred forty-five".