1986668852 has 48 divisors (see below), whose sum is σ = 4129305600. Its totient is φ = 818380800.

The previous prime is 1986668833. The next prime is 1986668857. The reversal of 1986668852 is 2588666891.

Its product of digits (9953280) is a multiple of the sum of its prime factors (15552).

It is a junction number, because it is equal to n+sod(n) for n = 1986668791 and 1986668800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1986668857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121652 + ... + 137012.

It is an arithmetic number, because the mean of its divisors is an integer number (86027200).

Almost surely, 2^1986668852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1986668852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2064652800).

1986668852 is an abundant number, since it is smaller than the sum of its proper divisors (2142636748).

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

1986668852 is a wasteful number, since it uses less digits than its factorization.

1986668852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15552 (or 15550 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 59.

The square root of 1986668852 is about 44572.0635824728. The cubic root of 1986668852 is about 1257.1154413025.

The spelling of 1986668852 in words is "one billion, nine hundred eighty-six million, six hundred sixty-eight thousand, eight hundred fifty-two".