189984838 has 32 divisors (see below), whose sum is σ = 308448000. Its totient is φ = 87487200.

The previous prime is 189984827. The next prime is 189984841. The reversal of 189984838 is 838489981.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 226023 + ... + 226861.

It is an arithmetic number, because the mean of its divisors is an integer number (9639000).

Almost surely, 2^189984838 is an apocalyptic number.

189984838 is a deficient number, since it is larger than the sum of its proper divisors (118463162).

189984838 is a wasteful number, since it uses less digits than its factorization.

189984838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1020.

The product of its digits is 3981312, while the sum is 58.

The square root of 189984838 is about 13783.4987575724. The cubic root of 189984838 is about 574.8744154215.

The spelling of 189984838 in words is "one hundred eighty-nine million, nine hundred eighty-four thousand, eight hundred thirty-eight".