188531980 has 96 divisors (see below), whose sum is σ = 494484480. Its totient is φ = 58786560.

The previous prime is 188531969. The next prime is 188532007. The reversal of 188531980 is 89135881.

188531980 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 128491 + ... + 129949.

It is an arithmetic number, because the mean of its divisors is an integer number (5150880).

Almost surely, 2^188531980 is an apocalyptic number.

188531980 is a gapful number since it is divisible by the number (10) 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 188531980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247242240).

188531980 is an abundant number, since it is smaller than the sum of its proper divisors (305952500).

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

188531980 is a wasteful number, since it uses less digits than its factorization.

188531980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559 (or 1557 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 43.

The square root of 188531980 is about 13730.6948112614. The cubic root of 188531980 is about 573.4052648467.

The spelling of 188531980 in words is "one hundred eighty-eight million, five hundred thirty-one thousand, nine hundred eighty".