1985718216 has 32 divisors (see below), whose sum is σ = 4967928000. Its totient is φ = 661421760.

The previous prime is 1985718211. The next prime is 1985718221. The reversal of 1985718216 is 6128175891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1985718211) and next prime (1985718221).

It is not an unprimeable number, because it can be changed into a prime (1985718211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4006 + ... + 63146.

It is an arithmetic number, because the mean of its divisors is an integer number (155247750).

Almost surely, 2^1985718216 is an apocalyptic number.

It is an amenable number.

1985718216 is an abundant number, since it is smaller than the sum of its proper divisors (2982209784).

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

1985718216 is a wasteful number, since it uses less digits than its factorization.

1985718216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60549 (or 60545 counting only the distinct ones).

The product of its digits is 241920, while the sum is 48.

The square root of 1985718216 is about 44561.3982724959. The cubic root of 1985718216 is about 1256.9148962445.

The spelling of 1985718216 in words is "one billion, nine hundred eighty-five million, seven hundred eighteen thousand, two hundred sixteen".