3865405776 has 20 divisors (see below), whose sum is σ = 9985631712. Its totient is φ = 1288468576.

The previous prime is 3865405769. The next prime is 3865405781. The reversal of 3865405776 is 6775045683.

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, 40264596 + ... + 40264691.

Almost surely, 2^3865405776 is an apocalyptic number.

It is an amenable number.

3865405776 is an abundant number, since it is smaller than the sum of its proper divisors (6120225936).

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

3865405776 is a wasteful number, since it uses less digits than its factorization.

3865405776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80529298 (or 80529292 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 51.

The square root of 3865405776 is about 62172.3875687592. The cubic root of 3865405776 is about 1569.3929490767.

The spelling of 3865405776 in words is "three billion, eight hundred sixty-five million, four hundred five thousand, seven hundred seventy-six".