1188911328 has 96 divisors (see below), whose sum is σ = 3413031552. Its totient is φ = 359385600.

The previous prime is 1188911323. The next prime is 1188911333. The reversal of 1188911328 is 8231198811.

It is an interprime number because it is at equal distance from previous prime (1188911323) and next prime (1188911333).

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 1188911328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188911323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517350 + ... + 519642.

It is an arithmetic number, because the mean of its divisors is an integer number (35552412).

Almost surely, 2^1188911328 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 1188911328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1706515776).

1188911328 is an abundant number, since it is smaller than the sum of its proper divisors (2224120224).

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

1188911328 is a wasteful number, since it uses less digits than its factorization.

1188911328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2808 (or 2800 counting only the distinct ones).

The product of its digits is 27648, while the sum is 42.

The square root of 1188911328 is about 34480.5934983724. The cubic root of 1188911328 is about 1059.3752483218.

The spelling of 1188911328 in words is "one billion, one hundred eighty-eight million, nine hundred eleven thousand, three hundred twenty-eight".