189432243 has 128 divisors (see below), whose sum is σ = 387932160. Its totient is φ = 88179840.

The previous prime is 189432233. The next prime is 189432281. The reversal of 189432243 is 342234981.

189432243 is a `hidden beast` number, since 189 + 432 + 2 + 43 = 666.

It is not a de Polignac number, because 189432243 - 2⁵ = 189432211 is a prime.

It is a super-2 number, since 2×189432243² = 71769149376022098, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 189432198 and 189432207.

It is not an unprimeable number, because it can be changed into a prime (189432203) 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 127 ways as a sum of consecutive naturals, for example, 1162080 + ... + 1162242.

It is an arithmetic number, because the mean of its divisors is an integer number (3030720).

Almost surely, 2^189432243 is an apocalyptic number.

189432243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

189432243 is an abundant number, since it is smaller than the sum of its proper divisors (198499917).

189432243 is a wasteful number, since it uses less digits than its factorization.

189432243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246 (or 240 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 189432243 is about 13763.4386328417. The cubic root of 189432243 is about 574.3165091051.

The spelling of 189432243 in words is "one hundred eighty-nine million, four hundred thirty-two thousand, two hundred forty-three".