188133912 has 96 divisors (see below), whose sum is σ = 527960160. Its totient is φ = 60480000.

The previous prime is 188133899. The next prime is 188133919. The reversal of 188133912 is 219331881.

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188133919) 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 23 ways as a sum of consecutive naturals, for example, 297837 + ... + 298467.

It is an arithmetic number, because the mean of its divisors is an integer number (5499585).

Almost surely, 2^188133912 is an apocalyptic number.

188133912 is a gapful number since it is divisible by the number (12) 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 188133912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263980080).

188133912 is an abundant number, since it is smaller than the sum of its proper divisors (339826248).

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

188133912 is a wasteful number, since it uses less digits than its factorization.

188133912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785 (or 778 counting only the distinct ones).

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

The square root of 188133912 is about 13716.1915997116. The cubic root of 188133912 is about 573.0014162588.

The spelling of 188133912 in words is "one hundred eighty-eight million, one hundred thirty-three thousand, nine hundred twelve".