1868061986 has 48 divisors (see below), whose sum is σ = 3365756064. Its totient is φ = 774861696.

The previous prime is 1868061977. The next prime is 1868061997. The reversal of 1868061986 is 6891608681.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 474221 + ... + 478143.

It is an arithmetic number, because the mean of its divisors is an integer number (70119918).

Almost surely, 2^1868061986 is an apocalyptic number.

1868061986 is a deficient number, since it is larger than the sum of its proper divisors (1497694078).

1868061986 is a wasteful number, since it uses less digits than its factorization.

1868061986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4095 (or 4088 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 1868061986 is about 43221.0826564999. The cubic root of 1868061986 is about 1231.5832138723.

The spelling of 1868061986 in words is "one billion, eight hundred sixty-eight million, sixty-one thousand, nine hundred eighty-six".