1868206988 has 6 divisors (see below), whose sum is σ = 3269362236. Its totient is φ = 934103492.

The previous prime is 1868206987. The next prime is 1868207023. The reversal of 1868206988 is 8896028681.

It is not an unprimeable number, because it can be changed into a prime (1868206981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 233525870 + ... + 233525877.

It is an arithmetic number, because the mean of its divisors is an integer number (544893706).

Almost surely, 2^1868206988 is an apocalyptic number.

It is an amenable number.

1868206988 is a deficient number, since it is larger than the sum of its proper divisors (1401155248).

1868206988 is a wasteful number, since it uses less digits than its factorization.

1868206988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467051751 (or 467051749 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 56.

The square root of 1868206988 is about 43222.7600692043. The cubic root of 1868206988 is about 1231.6150788765.

The spelling of 1868206988 in words is "one billion, eight hundred sixty-eight million, two hundred six thousand, nine hundred eighty-eight".