189163540 has 24 divisors (see below), whose sum is σ = 397992672. Its totient is φ = 75522720.

The previous prime is 189163531. The next prime is 189163553. The reversal of 189163540 is 45361981.

It is a self number, because there is not a number n which added to its sum of digits gives 189163540.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2295 + ... + 19585.

It is an arithmetic number, because the mean of its divisors is an integer number (16583028).

Almost surely, 2^189163540 is an apocalyptic number.

189163540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189163540 is an abundant number, since it is smaller than the sum of its proper divisors (208829132).

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

189163540 is a wasteful number, since it uses less digits than its factorization.

189163540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17847 (or 17845 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 189163540 is about 13753.6736910543. The cubic root of 189163540 is about 574.0448313271.

The spelling of 189163540 in words is "one hundred eighty-nine million, one hundred sixty-three thousand, five hundred forty".