189173887388 has 48 divisors (see below), whose sum is σ = 334720058400. Its totient is φ = 93547265280.

The previous prime is 189173887333. The next prime is 189173887447. The reversal of 189173887388 is 883788371981.

It is a super-3 number, since 3×189173887388³ (a number of 35 digits) contains 333 as substring.

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 15 ways as a sum of consecutive naturals, for example, 115560506 + ... + 115562142.

It is an arithmetic number, because the mean of its divisors is an integer number (6973334550).

Almost surely, 2^189173887388 is an apocalyptic number.

It is an amenable number.

189173887388 is a deficient number, since it is larger than the sum of its proper divisors (145546171012).

189173887388 is a wasteful number, since it uses less digits than its factorization.

189173887388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630 (or 2628 counting only the distinct ones).

The product of its digits is 130056192, while the sum is 71.

The spelling of 189173887388 in words is "one hundred eighty-nine billion, one hundred seventy-three million, eight hundred eighty-seven thousand, three hundred eighty-eight".