3964657394 has 24 divisors (see below), whose sum is σ = 6164254044. Its totient is φ = 1912377600.

The previous prime is 3964657391. The next prime is 3964657399. The reversal of 3964657394 is 4937564693.

It can be written as a sum of positive squares in 2 ways, for example, as 3524203225 + 440454169 = 59365^2 + 20987^2 .

It is not an unprimeable number, because it can be changed into a prime (3964657391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 644654 + ... + 650774.

Almost surely, 2^3964657394 is an apocalyptic number.

3964657394 is a deficient number, since it is larger than the sum of its proper divisors (2199596650).

3964657394 is a wasteful number, since it uses less digits than its factorization.

3964657394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6522 (or 6491 counting only the distinct ones).

The product of its digits is 14696640, while the sum is 56.

The square root of 3964657394 is about 62965.5254405139. The cubic root of 3964657394 is about 1582.7119735485.

The spelling of 3964657394 in words is "three billion, nine hundred sixty-four million, six hundred fifty-seven thousand, three hundred ninety-four".