189571812 has 24 divisors (see below), whose sum is σ = 442845312. Its totient is φ = 63117600.

The previous prime is 189571801. The next prime is 189571813. The reversal of 189571812 is 218175981.

189571812 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (189571813) 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 7 ways as a sum of consecutive naturals, for example, 2262 + ... + 19602.

It is an arithmetic number, because the mean of its divisors is an integer number (18451888).

Almost surely, 2^189571812 is an apocalyptic number.

189571812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

189571812 is an abundant number, since it is smaller than the sum of its proper divisors (253273500).

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

189571812 is a wasteful number, since it uses less digits than its factorization.

189571812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18259 (or 18257 counting only the distinct ones).

The product of its digits is 40320, while the sum is 42.

The square root of 189571812 is about 13768.5079801698. The cubic root of 189571812 is about 574.4575218877.

The spelling of 189571812 in words is "one hundred eighty-nine million, five hundred seventy-one thousand, eight hundred twelve".