1868671885 has 8 divisors (see below), whose sum is σ = 2273124600. Its totient is φ = 1474458624.

The previous prime is 1868671873. The next prime is 1868671897. The reversal of 1868671885 is 5881768681.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1868671873) and next prime (1868671897).

It can be written as a sum of positive squares in 4 ways, for example, as 734464201 + 1134207684 = 27101^2 + 33678^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1868671885 - 2¹¹ = 1868669837 is a prime.

It is a super-2 number, since 2×1868671885² = 6983869227578906450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2559460 + ... + 2560189.

It is an arithmetic number, because the mean of its divisors is an integer number (284140575).

Almost surely, 2^1868671885 is an apocalyptic number.

It is an amenable number.

1868671885 is a deficient number, since it is larger than the sum of its proper divisors (404452715).

1868671885 is an equidigital number, since it uses as much as digits as its factorization.

1868671885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5119727.

The product of its digits is 5160960, while the sum is 58.

The square root of 1868671885 is about 43228.1376536163. The cubic root of 1868671885 is about 1231.7172314879.

The spelling of 1868671885 in words is "one billion, eight hundred sixty-eight million, six hundred seventy-one thousand, eight hundred eighty-five".