189661230 has 128 divisors (see below), whose sum is σ = 580953600. Its totient is φ = 43545600.

The previous prime is 189661207. The next prime is 189661273. The reversal of 189661230 is 32166981.

189661230 is a `hidden beast` number, since 1 + 8 + 9 + 6 + 612 + 30 = 666.

189661230 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×189661230² = 71942764330225800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 54750 + ... + 58110.

It is an arithmetic number, because the mean of its divisors is an integer number (4538700).

Almost surely, 2^189661230 is an apocalyptic number.

189661230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189661230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290476800).

189661230 is an abundant number, since it is smaller than the sum of its proper divisors (391292370).

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

189661230 is a wasteful number, since it uses less digits than its factorization.

189661230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3407 (or 3401 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 189661230 is about 13771.7547901493. The cubic root of 189661230 is about 574.5478285072.

The spelling of 189661230 in words is "one hundred eighty-nine million, six hundred sixty-one thousand, two hundred thirty".