3898643842 has 8 divisors (see below), whose sum is σ = 6102225216. Its totient is φ = 1864568772.

The previous prime is 3898643809. The next prime is 3898643857. The reversal of 3898643842 is 2483468983.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 42376518 + ... + 42376609.

It is an arithmetic number, because the mean of its divisors is an integer number (762778152).

Almost surely, 2^3898643842 is an apocalyptic number.

3898643842 is a deficient number, since it is larger than the sum of its proper divisors (2203581374).

3898643842 is a wasteful number, since it uses less digits than its factorization.

3898643842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84753152.

The product of its digits is 7962624, while the sum is 55.

The square root of 3898643842 is about 62439.1210860627. The cubic root of 3898643842 is about 1573.8784445986.

It can be divided in two parts, 38986 and 43842, that added together give a palindrome (82828).

The spelling of 3898643842 in words is "three billion, eight hundred ninety-eight million, six hundred forty-three thousand, eight hundred forty-two".