189642000 has 80 divisors (see below), whose sum is σ = 611425152. Its totient is φ = 50569600.

The previous prime is 189641951. The next prime is 189642007. The reversal of 189642000 is 246981.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (189642007) 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 15 ways as a sum of consecutive naturals, for example, 9804 + ... + 21803.

Almost surely, 2^189642000 is an apocalyptic number.

189642000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189642000 is an abundant number, since it is smaller than the sum of its proper divisors (421783152).

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

189642000 is a wasteful number, since it uses less digits than its factorization.

189642000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31633 (or 31617 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 189642000 is about 13771.0566043423. The cubic root of 189642000 is about 574.5284097991.

Adding to 189642000 its reverse (246981), we get a palindrome (189888981).

The spelling of 189642000 in words is "one hundred eighty-nine million, six hundred forty-two thousand".