3945139764 has 24 divisors (see below), whose sum is σ = 9208604160. Its totient is φ = 1314578304.

The previous prime is 3945139741. The next prime is 3945139771. The reversal of 3945139764 is 4679315493.

It is a congruent number.

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, 22549 + ... + 91644.

It is an arithmetic number, because the mean of its divisors is an integer number (383691840).

Almost surely, 2^3945139764 is an apocalyptic number.

It is an amenable number.

3945139764 is an abundant number, since it is smaller than the sum of its proper divisors (5263464396).

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

3945139764 is a wasteful number, since it uses less digits than its factorization.

3945139764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117079 (or 117077 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 51.

The square root of 3945139764 is about 62810.3475870019. The cubic root of 3945139764 is about 1580.1105199622.

The spelling of 3945139764 in words is "three billion, nine hundred forty-five million, one hundred thirty-nine thousand, seven hundred sixty-four".