989863236 has 72 divisors (see below), whose sum is σ = 2616082560. Its totient is φ = 314987904.

The previous prime is 989863219. The next prime is 989863243. The reversal of 989863236 is 632368989.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 614400 + ... + 616008.

It is an arithmetic number, because the mean of its divisors is an integer number (36334480).

Almost surely, 2^989863236 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 989863236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1308041280).

989863236 is an abundant number, since it is smaller than the sum of its proper divisors (1626219324).

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

989863236 is a wasteful number, since it uses less digits than its factorization.

989863236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2385 (or 2380 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 989863236 is about 31462.0920474148. The cubic root of 989863236 is about 996.6095968237.

It can be divided in two parts, 989863 and 236, that added together give a palindrome (990099).

The spelling of 989863236 in words is "nine hundred eighty-nine million, eight hundred sixty-three thousand, two hundred thirty-six".