789661128 has 64 divisors (see below), whose sum is σ = 2082456000. Its totient is φ = 248838912.

The previous prime is 789661123. The next prime is 789661153. The reversal of 789661128 is 821166987.

It is not an unprimeable number, because it can be changed into a prime (789661123) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 252438 + ... + 255546.

It is an arithmetic number, because the mean of its divisors is an integer number (32538375).

Almost surely, 2^789661128 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 789661128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041228000).

789661128 is an abundant number, since it is smaller than the sum of its proper divisors (1292794872).

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

789661128 is a wasteful number, since it uses less digits than its factorization.

789661128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3694 (or 3690 counting only the distinct ones).

The product of its digits is 290304, while the sum is 48.

The square root of 789661128 is about 28100.9097361633. The cubic root of 789661128 is about 924.3013484586.

The spelling of 789661128 in words is "seven hundred eighty-nine million, six hundred sixty-one thousand, one hundred twenty-eight".