3945817764 has 72 divisors (see below), whose sum is σ = 11766763008. Its totient is φ = 1091007360.

The previous prime is 3945817741. The next prime is 3945817769. The reversal of 3945817764 is 4677185493.

It is a self number, because there is not a number n which added to its sum of digits gives 3945817764.

It is not an unprimeable number, because it can be changed into a prime (3945817769) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244737 + ... + 260360.

It is an arithmetic number, because the mean of its divisors is an integer number (163427264).

Almost surely, 2^3945817764 is an apocalyptic number.

It is an amenable number.

3945817764 is an abundant number, since it is smaller than the sum of its proper divisors (7820945244).

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

3945817764 is a wasteful number, since it uses less digits than its factorization.

3945817764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505145 (or 505140 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 3945817764 is about 62815.7445550079. The cubic root of 3945817764 is about 1580.2010324773.

The spelling of 3945817764 in words is "three billion, nine hundred forty-five million, eight hundred seventeen thousand, seven hundred sixty-four".