189438912 has 168 divisors, whose sum is σ = 607066096. Its totient is φ = 58226688.

The previous prime is 189438881. The next prime is 189438947. The reversal of 189438912 is 219834981.

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

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 201708 + ... + 202644.

Almost surely, 2^189438912 is an apocalyptic number.

189438912 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 189438912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303533048).

189438912 is an abundant number, since it is smaller than the sum of its proper divisors (417627184).

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

189438912 is an equidigital number, since it uses as much as digits as its factorization.

189438912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 977 (or 955 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 189438912 is about 13763.6809030143. The cubic root of 189438912 is about 574.3232486685.

The spelling of 189438912 in words is "one hundred eighty-nine million, four hundred thirty-eight thousand, nine hundred twelve".