1986671682 has 12 divisors (see below), whose sum is σ = 4304455350. Its totient is φ = 662223888.

The previous prime is 1986671677. The next prime is 1986671707. The reversal of 1986671682 is 2861766891.

It can be written as a sum of positive squares in only one way, i.e., 1754688321 + 231983361 = 41889^2 + 15231^2 .

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, 55185307 + ... + 55185342.

Almost surely, 2^1986671682 is an apocalyptic number.

1986671682 is an abundant number, since it is smaller than the sum of its proper divisors (2317783668).

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

1986671682 is a wasteful number, since it uses less digits than its factorization.

1986671682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110370657 (or 110370654 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 54.

The square root of 1986671682 is about 44572.0953288041. The cubic root of 1986671682 is about 1257.1160382204.

The spelling of 1986671682 in words is "one billion, nine hundred eighty-six million, six hundred seventy-one thousand, six hundred eighty-two".