3945616408 has 16 divisors (see below), whose sum is σ = 7429785480. Its totient is φ = 1964340288.

The previous prime is 3945616391. The next prime is 3945616421. The reversal of 3945616408 is 8046165493.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056510 + ... + 1060237.

Almost surely, 2^3945616408 is an apocalyptic number.

It is an amenable number.

3945616408 is a deficient number, since it is larger than the sum of its proper divisors (3484169072).

3945616408 is a wasteful number, since it uses less digits than its factorization.

3945616408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2116986 (or 2116982 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 3945616408 is about 62814.1417835188. The cubic root of 3945616408 is about 1580.1741526778.

The spelling of 3945616408 in words is "three billion, nine hundred forty-five million, six hundred sixteen thousand, four hundred eight".