1868485985 has 8 divisors (see below), whose sum is σ = 2243656896. Its totient is φ = 1493806320.

The previous prime is 1868485967. The next prime is 1868485999. The reversal of 1868485985 is 5895848681.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1868485985 - 2¹⁴ = 1868469601 is a prime.

It is a super-2 number, since 2×1868485985² = 6982479752282840450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114389 + ... + 129698.

It is an arithmetic number, because the mean of its divisors is an integer number (280457112).

Almost surely, 2^1868485985 is an apocalyptic number.

It is an amenable number.

1868485985 is a deficient number, since it is larger than the sum of its proper divisors (375170911).

1868485985 is a wasteful number, since it uses less digits than its factorization.

1868485985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245623.

The product of its digits is 22118400, while the sum is 62.

The square root of 1868485985 is about 43225.9873802785. The cubic root of 1868485985 is about 1231.6763853967.

The spelling of 1868485985 in words is "one billion, eight hundred sixty-eight million, four hundred eighty-five thousand, nine hundred eighty-five".