3878075765 has 16 divisors (see below), whose sum is σ = 4711238640. Its totient is φ = 3064174080.

The previous prime is 3878075753. The next prime is 3878075809. The reversal of 3878075765 is 5675708783.

3878075765 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 163660849 + 3714414916 = 12793^2 + 60946^2 .

It is not a de Polignac number, because 3878075765 - 2¹⁶ = 3878010229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3878075765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 439295 + ... + 448035.

It is an arithmetic number, because the mean of its divisors is an integer number (294452415).

Almost surely, 2^3878075765 is an apocalyptic number.

It is an amenable number.

3878075765 is a deficient number, since it is larger than the sum of its proper divisors (833162875).

3878075765 is an equidigital number, since it uses as much as digits as its factorization.

3878075765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9832.

The product of its (nonzero) digits is 9878400, while the sum is 56.

The square root of 3878075765 is about 62274.1982284798. The cubic root of 3878075765 is about 1571.1057925767.

The spelling of 3878075765 in words is "three billion, eight hundred seventy-eight million, seventy-five thousand, seven hundred sixty-five".