989820234 has 48 divisors (see below), whose sum is σ = 2317896672. Its totient is φ = 303463584.

The previous prime is 989820217. The next prime is 989820241. The reversal of 989820234 is 432028989.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 989820234.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58749 + ... + 73695.

It is an arithmetic number, because the mean of its divisors is an integer number (48289514).

Almost surely, 2^989820234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989820234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1158948336).

989820234 is an abundant number, since it is smaller than the sum of its proper divisors (1328076438).

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

989820234 is a wasteful number, since it uses less digits than its factorization.

989820234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15251 (or 15248 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 989820234 is about 31461.4086461493. The cubic root of 989820234 is about 996.5951649221.

The spelling of 989820234 in words is "nine hundred eighty-nine million, eight hundred twenty thousand, two hundred thirty-four".