189643792 has 20 divisors (see below), whose sum is σ = 395699500. Its totient is φ = 87527808.

The previous prime is 189643787. The next prime is 189643793. The reversal of 189643792 is 297346981.

It can be written as a sum of positive squares in 2 ways, for example, as 102333456 + 87310336 = 10116^2 + 9344^2 .

It is not an unprimeable number, because it can be changed into a prime (189643793) 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 3 ways as a sum of consecutive naturals, for example, 455667 + ... + 456082.

It is an arithmetic number, because the mean of its divisors is an integer number (19784975).

Almost surely, 2^189643792 is an apocalyptic number.

It is an amenable number.

189643792 is an abundant number, since it is smaller than the sum of its proper divisors (206055708).

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

189643792 is a wasteful number, since it uses less digits than its factorization.

189643792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911770 (or 911764 counting only the distinct ones).

The product of its digits is 653184, while the sum is 49.

The square root of 189643792 is about 13771.1216681867. The cubic root of 189643792 is about 574.5302194399.

The spelling of 189643792 in words is "one hundred eighty-nine million, six hundred forty-three thousand, seven hundred ninety-two".