189644500 has 24 divisors (see below), whose sum is σ = 414184680. Its totient is φ = 75857600.

The previous prime is 189644471. The next prime is 189644513. The reversal of 189644500 is 5446981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 45212176 + 144432324 = 6724^2 + 12018^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 189644500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189145 + ... + 190144.

It is an arithmetic number, because the mean of its divisors is an integer number (17257695).

Almost surely, 2^189644500 is an apocalyptic number.

189644500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189644500 is an abundant number, since it is smaller than the sum of its proper divisors (224540180).

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

189644500 is a wasteful number, since it uses less digits than its factorization.

189644500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379308 (or 379296 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 189644500 is about 13771.1473741297. The cubic root of 189644500 is about 574.5309344064.

The spelling of 189644500 in words is "one hundred eighty-nine million, six hundred forty-four thousand, five hundred".