1188238528 has 56 divisors (see below), whose sum is σ = 2505913200. Its totient is φ = 559023104.

The previous prime is 1188238523. The next prime is 1188238553. The reversal of 1188238528 is 8258328811.

It is not an unprimeable number, because it can be changed into a prime (1188238523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312543 + ... + 316321.

It is an arithmetic number, because the mean of its divisors is an integer number (44748450).

Almost surely, 2^1188238528 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 1188238528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1252956600).

1188238528 is an abundant number, since it is smaller than the sum of its proper divisors (1317674672).

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

1188238528 is an frugal number, since it uses more digits than its factorization.

1188238528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3842 (or 3798 counting only the distinct ones).

The product of its digits is 245760, while the sum is 46.

The square root of 1188238528 is about 34470.8359051532. The cubic root of 1188238528 is about 1059.1753785924.

The spelling of 1188238528 in words is "one billion, one hundred eighty-eight million, two hundred thirty-eight thousand, five hundred twenty-eight".