189143508 has 24 divisors (see below), whose sum is σ = 445707360. Its totient is φ = 62423200.

The previous prime is 189143491. The next prime is 189143509. The reversal of 189143508 is 805341981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189143509) 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 7 ways as a sum of consecutive naturals, for example, 76818 + ... + 79241.

It is an arithmetic number, because the mean of its divisors is an integer number (18571140).

Almost surely, 2^189143508 is an apocalyptic number.

It is an amenable number.

189143508 is an abundant number, since it is smaller than the sum of its proper divisors (256563852).

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

189143508 is a wasteful number, since it uses less digits than its factorization.

189143508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156167 (or 156165 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 39.

The square root of 189143508 is about 13752.9454299797. The cubic root of 189143508 is about 574.0245672529.

It can be divided in two parts, 18914 and 3508, that added together give a palindrome (22422).

The spelling of 189143508 in words is "one hundred eighty-nine million, one hundred forty-three thousand, five hundred eight".