3989654851238 has 16 divisors (see below), whose sum is σ = 6839436683040. Its totient is φ = 1709844987456.

The previous prime is 3989654851219. The next prime is 3989654851243. The reversal of 3989654851238 is 8321584569893.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4302098 + ... + 5146586.

It is an arithmetic number, because the mean of its divisors is an integer number (427464792690).

Almost surely, 2^{3989654851238} is an apocalyptic number.

3989654851238 is a deficient number, since it is larger than the sum of its proper divisors (2849781831802).

3989654851238 is a wasteful number, since it uses less digits than its factorization.

3989654851238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181951.

The product of its digits is 447897600, while the sum is 71.

The spelling of 3989654851238 in words is "three trillion, nine hundred eighty-nine billion, six hundred fifty-four million, eight hundred fifty-one thousand, two hundred thirty-eight".