189198612 has 96 divisors (see below), whose sum is σ = 509443200. Its totient is φ = 60673536.

The previous prime is 189198589. The next prime is 189198613. The reversal of 189198612 is 216891981.

189198612 is a `hidden beast` number, since 18 + 9 + 19 + 8 + 612 = 666.

It is a super-2 number, since 2×189198612² = 71592229565453088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189198613) 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 31 ways as a sum of consecutive naturals, for example, 451339 + ... + 451757.

It is an arithmetic number, because the mean of its divisors is an integer number (5306700).

Almost surely, 2^189198612 is an apocalyptic number.

189198612 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 189198612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254721600).

189198612 is an abundant number, since it is smaller than the sum of its proper divisors (320244588).

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

189198612 is a wasteful number, since it uses less digits than its factorization.

189198612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 582 (or 574 counting only the distinct ones).

The product of its digits is 62208, while the sum is 45.

The square root of 189198612 is about 13754.9486367634. The cubic root of 189198612 is about 574.0803061975.

The spelling of 189198612 in words is "one hundred eighty-nine million, one hundred ninety-eight thousand, six hundred twelve".