3989195827986 has 16 divisors (see below), whose sum is σ = 7988931152064. Its totient is φ = 1327975359984.

The previous prime is 3989195827961. The next prime is 3989195827999. The reversal of 3989195827986 is 6897285919893.

It is a junction number, because it is equal to n+sod(n) for n = 3989195827899 and 3989195827908.

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, 439140750 + ... + 439149833.

It is an arithmetic number, because the mean of its divisors is an integer number (499308197004).

Almost surely, 2^{3989195827986} is an apocalyptic number.

3989195827986 is an abundant number, since it is smaller than the sum of its proper divisors (3999735324078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3989195827986 is a wasteful number, since it uses less digits than its factorization.

3989195827986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878291345.

The product of its digits is 4232632320, while the sum is 84.

The spelling of 3989195827986 in words is "three trillion, nine hundred eighty-nine billion, one hundred ninety-five million, eight hundred twenty-seven thousand, nine hundred eighty-six".