1985743236 has 48 divisors (see below), whose sum is σ = 4689135360. Its totient is φ = 653986080.

The previous prime is 1985743229. The next prime is 1985743247. The reversal of 1985743236 is 6323475891.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 536151 + ... + 539841.

It is an arithmetic number, because the mean of its divisors is an integer number (97690320).

Almost surely, 2^1985743236 is an apocalyptic number.

It is an amenable number.

1985743236 is an abundant number, since it is smaller than the sum of its proper divisors (2703392124).

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

1985743236 is a wasteful number, since it uses less digits than its factorization.

1985743236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4224 (or 4222 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 1985743236 is about 44561.6790078650. The cubic root of 1985743236 is about 1256.9201752544.

The spelling of 1985743236 in words is "one billion, nine hundred eighty-five million, seven hundred forty-three thousand, two hundred thirty-six".