188009136 has 180 divisors, whose sum is σ = 626403856. Its totient is φ = 51528960.

The previous prime is 188009119. The next prime is 188009147. The reversal of 188009136 is 631900881.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 188009136.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 2647981 + ... + 2648051.

Almost surely, 2^188009136 is an apocalyptic number.

188009136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188009136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313201928).

188009136 is an abundant number, since it is smaller than the sum of its proper divisors (438394720).

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

188009136 is a wasteful number, since it uses less digits than its factorization.

188009136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 188009136 is about 13711.6423523953. The cubic root of 188009136 is about 572.8747110553.

The spelling of 188009136 in words is "one hundred eighty-eight million, nine thousand, one hundred thirty-six".