986943636 has 192 divisors, whose sum is σ = 3173506560. Its totient is φ = 258785280.

The previous prime is 986943623. The next prime is 986943641. The reversal of 986943636 is 636349689.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 525996 + ... + 527868.

It is an arithmetic number, because the mean of its divisors is an integer number (16528680).

Almost surely, 2^986943636 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 986943636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1586753280).

986943636 is an abundant number, since it is smaller than the sum of its proper divisors (2186562924).

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

986943636 is a wasteful number, since it uses less digits than its factorization.

986943636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1951 (or 1943 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The square root of 986943636 is about 31415.6590890594. The cubic root of 986943636 is about 995.6287991102.

The spelling of 986943636 in words is "nine hundred eighty-six million, nine hundred forty-three thousand, six hundred thirty-six".