989605764 has 135 divisors (see below), whose sum is σ = 2945775287. Its totient is φ = 280102032.

The previous prime is 989605759. The next prime is 989605781. The reversal of 989605764 is 467506989.

The square root of 989605764 is 31458.

It is a perfect power (a square), and thus also a powerful number.

989605764 is a `hidden beast` number, since 9 + 8 + 9 + 60 + 576 + 4 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 989605764.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 9248599 + ... + 9248705.

Almost surely, 2^989605764 is an apocalyptic number.

989605764 is the 31458-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989605764

989605764 is an abundant number, since it is smaller than the sum of its proper divisors (1956169523).

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

989605764 is a wasteful number, since it uses less digits than its factorization.

989605764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 119 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The cubic root of 989605764 is about 996.5231804017.

The spelling of 989605764 in words is "nine hundred eighty-nine million, six hundred five thousand, seven hundred sixty-four".