189861336 has 48 divisors (see below), whose sum is σ = 587667600. Its totient is φ = 54245952.

The previous prime is 189861307. The next prime is 189861337. The reversal of 189861336 is 633168981.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 189861291 and 189861300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189861337) 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, 187851 + ... + 188858.

It is an arithmetic number, because the mean of its divisors is an integer number (12243075).

Almost surely, 2^189861336 is an apocalyptic number.

It is an amenable number.

189861336 is an abundant number, since it is smaller than the sum of its proper divisors (397806264).

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

189861336 is a wasteful number, since it uses less digits than its factorization.

189861336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376728 (or 376721 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 189861336 is about 13779.0179621046. The cubic root of 189861336 is about 574.7498203384.

The spelling of 189861336 in words is "one hundred eighty-nine million, eight hundred sixty-one thousand, three hundred thirty-six".