3858865787 has 6 divisors (see below), whose sum is σ = 4488884748. Its totient is φ = 3307599204.

The previous prime is 3858865729. The next prime is 3858865811. The reversal of 3858865787 is 7875688583.

It is not a de Polignac number, because 3858865787 - 2¹² = 3858861691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3858865187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39376133 + ... + 39376230.

It is an arithmetic number, because the mean of its divisors is an integer number (748147458).

Almost surely, 2^3858865787 is an apocalyptic number.

3858865787 is a deficient number, since it is larger than the sum of its proper divisors (630018961).

3858865787 is an equidigital number, since it uses as much as digits as its factorization.

3858865787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78752377 (or 78752370 counting only the distinct ones).

The product of its digits is 90316800, while the sum is 65.

The square root of 3858865787 is about 62119.7696953232. The cubic root of 3858865787 is about 1568.5073493743.

The spelling of 3858865787 in words is "three billion, eight hundred fifty-eight million, eight hundred sixty-five thousand, seven hundred eighty-seven".