989783872 has 252 divisors, whose sum is σ = 2683642080. Its totient is φ = 353548800.

The previous prime is 989783849. The next prime is 989783923. The reversal of 989783872 is 278387989.

It is a super-2 number, since 2×989783872² = 1959344226542624768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 989783872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 31928497 + ... + 31928527.

Almost surely, 2^989783872 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 989783872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341821040).

989783872 is an abundant number, since it is smaller than the sum of its proper divisors (1693858208).

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

989783872 is a wasteful number, since it uses less digits than its factorization.

989783872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 70 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 61.

The square root of 989783872 is about 31460.8307582619. The cubic root of 989783872 is about 996.5829611448.

The spelling of 989783872 in words is "nine hundred eighty-nine million, seven hundred eighty-three thousand, eight hundred seventy-two".