3888260865 has 24 divisors (see below), whose sum is σ = 6749719080. Its totient is φ = 2070641664.

The previous prime is 3888260861. The next prime is 3888260879. The reversal of 3888260865 is 5680628883.

It can be written as a sum of positive squares in 4 ways, for example, as 1183428801 + 2704832064 = 34401^2 + 52008^2 .

It is not a de Polignac number, because 3888260865 - 2² = 3888260861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3888260861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33910 + ... + 94479.

It is an arithmetic number, because the mean of its divisors is an integer number (281238295).

Almost surely, 2^3888260865 is an apocalyptic number.

It is an amenable number.

3888260865 is a deficient number, since it is larger than the sum of its proper divisors (2861458215).

3888260865 is a wasteful number, since it uses less digits than its factorization.

3888260865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129073 (or 129070 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 54.

The square root of 3888260865 is about 62355.9208495873. The cubic root of 3888260865 is about 1572.4800034191.

The spelling of 3888260865 in words is "three billion, eight hundred eighty-eight million, two hundred sixty thousand, eight hundred sixty-five".