1985385718 has 8 divisors (see below), whose sum is σ = 3008780712. Its totient is φ = 982458816.

The previous prime is 1985385707. The next prime is 1985385719. The reversal of 1985385718 is 8175835891.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985385719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5116780 + ... + 5117167.

It is an arithmetic number, because the mean of its divisors is an integer number (376097589).

Almost surely, 2^1985385718 is an apocalyptic number.

1985385718 is a deficient number, since it is larger than the sum of its proper divisors (1023394994).

1985385718 is a wasteful number, since it uses less digits than its factorization.

1985385718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10234046.

The product of its digits is 2419200, while the sum is 55.

The square root of 1985385718 is about 44557.6673312237. The cubic root of 1985385718 is about 1256.8447377473.

The spelling of 1985385718 in words is "one billion, nine hundred eighty-five million, three hundred eighty-five thousand, seven hundred eighteen".