3898268785 has 4 divisors (see below), whose sum is σ = 4677922548. Its totient is φ = 3118615024.

The previous prime is 3898268753. The next prime is 3898268789. The reversal of 3898268785 is 5878628983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5878628983 = 31 ⋅189633193.

It can be written as a sum of positive squares in 2 ways, for example, as 2733616656 + 1164652129 = 52284^2 + 34127^2 .

It is a cyclic number.

It is not a de Polignac number, because 3898268785 - 2⁵ = 3898268753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3898268789) 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 3 ways as a sum of consecutive naturals, for example, 389826874 + ... + 389826883.

It is an arithmetic number, because the mean of its divisors is an integer number (1169480637).

Almost surely, 2^3898268785 is an apocalyptic number.

It is an amenable number.

3898268785 is a deficient number, since it is larger than the sum of its proper divisors (779653763).

3898268785 is an equidigital number, since it uses as much as digits as its factorization.

3898268785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779653762.

The product of its digits is 46448640, while the sum is 64.

The square root of 3898268785 is about 62436.1176323448. The cubic root of 3898268785 is about 1573.8279729404.

The spelling of 3898268785 in words is "three billion, eight hundred ninety-eight million, two hundred sixty-eight thousand, seven hundred eighty-five".