123189528 has 192 divisors, whose sum is σ = 398908800. Its totient is φ = 31342080.

The previous prime is 123189523. The next prime is 123189553. The reversal of 123189528 is 825981321.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123189523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1151251 + ... + 1151357.

It is an arithmetic number, because the mean of its divisors is an integer number (2077650).

Almost surely, 2^123189528 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 123189528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199454400).

123189528 is an abundant number, since it is smaller than the sum of its proper divisors (275719272).

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

123189528 is a wasteful number, since it uses less digits than its factorization.

123189528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230 (or 219 counting only the distinct ones).

The product of its digits is 34560, while the sum is 39.

The square root of 123189528 is about 11099.0777995291. The cubic root of 123189528 is about 497.5742882087.

The spelling of 123189528 in words is "one hundred twenty-three million, one hundred eighty-nine thousand, five hundred twenty-eight".