189938850 has 24 divisors (see below), whose sum is σ = 471048720. Its totient is φ = 50650320.

The previous prime is 189938813. The next prime is 189938857. The reversal of 189938850 is 58839981.

It is a junction number, because it is equal to n+sod(n) for n = 189938793 and 189938802.

It is not an unprimeable number, because it can be changed into a prime (189938857) 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 11 ways as a sum of consecutive naturals, for example, 632980 + ... + 633279.

It is an arithmetic number, because the mean of its divisors is an integer number (19627030).

Almost surely, 2^189938850 is an apocalyptic number.

189938850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189938850 is an abundant number, since it is smaller than the sum of its proper divisors (281109870).

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

189938850 is a wasteful number, since it uses less digits than its factorization.

189938850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266274 (or 1266269 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 51.

The square root of 189938850 is about 13781.8304299538. The cubic root of 189938850 is about 574.8280267055.

The spelling of 189938850 in words is "one hundred eighty-nine million, nine hundred thirty-eight thousand, eight hundred fifty".