1868089860 has 288 divisors, whose sum is σ = 7096078080. Its totient is φ = 387265536.

The previous prime is 1868089859. The next prime is 1868089879. The reversal of 1868089860 is 689808681.

It is a junction number, because it is equal to n+sod(n) for n = 1868089797 and 1868089806.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 965454 + ... + 967386.

It is an arithmetic number, because the mean of its divisors is an integer number (24639160).

Almost surely, 2^1868089860 is an apocalyptic number.

1868089860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1868089860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3548039040).

1868089860 is an abundant number, since it is smaller than the sum of its proper divisors (5227988220).

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

1868089860 is a wasteful number, since it uses less digits than its factorization.

1868089860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027 (or 2022 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The square root of 1868089860 is about 43221.4051136702. The cubic root of 1868089860 is about 1231.5893394685.

The spelling of 1868089860 in words is "one billion, eight hundred sixty-eight million, eighty-nine thousand, eight hundred sixty".