189878982 has 16 divisors (see below), whose sum is σ = 379894320. Its totient is φ = 63270272.

The previous prime is 189878963. The next prime is 189878993. The reversal of 189878982 is 289878981.

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 7 ways as a sum of consecutive naturals, for example, 26098 + ... + 32570.

It is an arithmetic number, because the mean of its divisors is an integer number (23743395).

Almost surely, 2^189878982 is an apocalyptic number.

189878982 is an abundant number, since it is smaller than the sum of its proper divisors (190015338).

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

189878982 is a wasteful number, since it uses less digits than its factorization.

189878982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11367.

The product of its digits is 4644864, while the sum is 60.

The square root of 189878982 is about 13779.6582686219. The cubic root of 189878982 is about 574.7676258263.

Subtracting 189878982 from its reverse (289878981), we obtain a palindrome (99999999).

The spelling of 189878982 in words is "one hundred eighty-nine million, eight hundred seventy-eight thousand, nine hundred eighty-two".