189729380 has 12 divisors (see below), whose sum is σ = 398431740. Its totient is φ = 75891744.

The previous prime is 189729361. The next prime is 189729403. The reversal of 189729380 is 83927981.

It can be written as a sum of positive squares in 2 ways, for example, as 44382244 + 145347136 = 6662^2 + 12056^2 .

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 3 ways as a sum of consecutive naturals, for example, 4743215 + ... + 4743254.

It is an arithmetic number, because the mean of its divisors is an integer number (33202645).

Almost surely, 2^189729380 is an apocalyptic number.

189729380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189729380 is an abundant number, since it is smaller than the sum of its proper divisors (208702360).

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

189729380 is a wasteful number, since it uses less digits than its factorization.

189729380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9486478 (or 9486476 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 189729380 is about 13774.2288350383. The cubic root of 189729380 is about 574.6166367108.

The spelling of 189729380 in words is "one hundred eighty-nine million, seven hundred twenty-nine thousand, three hundred eighty".