189913188 has 48 divisors (see below), whose sum is σ = 470171520. Its totient is φ = 59457024.

The previous prime is 189913127. The next prime is 189913201. The reversal of 189913188 is 881319981.

It is a super-3 number, since 3×189913188³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

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, 186970 + ... + 187982.

It is an arithmetic number, because the mean of its divisors is an integer number (9795240).

Almost surely, 2^189913188 is an apocalyptic number.

It is an amenable number.

189913188 is an abundant number, since it is smaller than the sum of its proper divisors (280258332).

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

189913188 is a wasteful number, since it uses less digits than its factorization.

189913188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956 (or 1954 counting only the distinct ones).

The product of its digits is 124416, while the sum is 48.

The square root of 189913188 is about 13780.8993900979. The cubic root of 189913188 is about 574.8021378450.

The spelling of 189913188 in words is "one hundred eighty-nine million, nine hundred thirteen thousand, one hundred eighty-eight".