189878830838 has 8 divisors (see below), whose sum is σ = 284820158280. Its totient is φ = 94938778080.

The previous prime is 189878830837. The next prime is 189878830861. The reversal of 189878830838 is 838038878981.

189878830838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189878830837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274733 + ... + 674711.

It is an arithmetic number, because the mean of its divisors is an integer number (35602519785).

Almost surely, 2^189878830838 is an apocalyptic number.

189878830838 is a deficient number, since it is larger than the sum of its proper divisors (94941327442).

189878830838 is a wasteful number, since it uses less digits than its factorization.

189878830838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637342.

The product of its (nonzero) digits is 148635648, while the sum is 71.

The spelling of 189878830838 in words is "one hundred eighty-nine billion, eight hundred seventy-eight million, eight hundred thirty thousand, eight hundred thirty-eight".