989550720 has 192 divisors, whose sum is σ = 3442959000. Its totient is φ = 261881856.

The previous prime is 989550691. The next prime is 989550763. The reversal of 989550720 is 27055989.

It is a happy number.

989550720 is a `hidden beast` number, since 98 + 9 + 550 + 7 + 2 + 0 = 666.

989550720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 739404864 + 250145856 = 27192^2 + 15816^2 .

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 857664 + ... + 858816.

Almost surely, 2^989550720 is an apocalyptic number.

989550720 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 989550720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1721479500).

989550720 is an abundant number, since it is smaller than the sum of its proper divisors (2453408280).

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

989550720 is a wasteful number, since it uses less digits than its factorization.

989550720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327 (or 1312 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 989550720 is about 31457.1251070405. The cubic root of 989550720 is about 996.5047038053.

The spelling of 989550720 in words is "nine hundred eighty-nine million, five hundred fifty thousand, seven hundred twenty".