1986424686 has 12 divisors (see below), whose sum is σ = 4303920192. Its totient is φ = 662141556.

The previous prime is 1986424669. The next prime is 1986424691. The reversal of 1986424686 is 6864246891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55178446 + ... + 55178481.

It is an arithmetic number, because the mean of its divisors is an integer number (358660016).

Almost surely, 2^1986424686 is an apocalyptic number.

1986424686 is an abundant number, since it is smaller than the sum of its proper divisors (2317495506).

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

1986424686 is a wasteful number, since it uses less digits than its factorization.

1986424686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110356935 (or 110356932 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The square root of 1986424686 is about 44569.3244956663. The cubic root of 1986424686 is about 1257.0639384355.

The spelling of 1986424686 in words is "one billion, nine hundred eighty-six million, four hundred twenty-four thousand, six hundred eighty-six".