989729280 has 480 divisors, whose sum is σ = 3735635904. Its totient is φ = 250822656.

The previous prime is 989729263. The next prime is 989729291. The reversal of 989729280 is 82927989.

It is a tau number, because it is divible by the number of its divisors (480).

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 23016939 + ... + 23016981.

Almost surely, 2^989729280 is an apocalyptic number.

989729280 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989729280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1867817952).

989729280 is an abundant number, since it is smaller than the sum of its proper divisors (2745906624).

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

989729280 is an equidigital number, since it uses as much as digits as its factorization.

989729280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 989729280 is about 31459.9631277597. The cubic root of 989729280 is about 996.5646384722.

The spelling of 989729280 in words is "nine hundred eighty-nine million, seven hundred twenty-nine thousand, two hundred eighty".