188081208 has 144 divisors (see below), whose sum is σ = 600210000. Its totient is φ = 53044992.

The previous prime is 188081197. The next prime is 188081213. The reversal of 188081208 is 802180881.

It is a happy number.

188081208 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 313693 + ... + 314291.

It is an arithmetic number, because the mean of its divisors is an integer number (4168125).

Almost surely, 2^188081208 is an apocalyptic number.

188081208 is a gapful number since it is divisible by the number (18) 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 188081208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300105000).

188081208 is an abundant number, since it is smaller than the sum of its proper divisors (412128792).

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

188081208 is a wasteful number, since it uses less digits than its factorization.

188081208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 36.

The square root of 188081208 is about 13714.2702321341. The cubic root of 188081208 is about 572.9479042209.

The spelling of 188081208 in words is "one hundred eighty-eight million, eighty-one thousand, two hundred eight".