3921145268 has 24 divisors (see below), whose sum is σ = 7347299400. Its totient is φ = 1824508928.

The previous prime is 3921145259. The next prime is 3921145279. The reversal of 3921145268 is 8625411293.

It can be written as a sum of positive squares in 4 ways, for example, as 1051186084 + 2869959184 = 32422^2 + 53572^2 .

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, 317903 + ... + 330006.

It is an arithmetic number, because the mean of its divisors is an integer number (306137475).

Almost surely, 2^3921145268 is an apocalyptic number.

It is an amenable number.

3921145268 is a deficient number, since it is larger than the sum of its proper divisors (3426154132).

3921145268 is a wasteful number, since it uses less digits than its factorization.

3921145268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648019 (or 648017 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 3921145268 is about 62619.0487631360. The cubic root of 3921145268 is about 1576.9005719143.

The spelling of 3921145268 in words is "three billion, nine hundred twenty-one million, one hundred forty-five thousand, two hundred sixty-eight".