189744388 has 24 divisors (see below), whose sum is σ = 348643008. Its totient is φ = 90183456.

The previous prime is 189744377. The next prime is 189744403. The reversal of 189744388 is 883447981.

It is a super-3 number, since 3×189744388³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8670 + ... + 21322.

It is an arithmetic number, because the mean of its divisors is an integer number (14526792).

Almost surely, 2^189744388 is an apocalyptic number.

It is an amenable number.

189744388 is a deficient number, since it is larger than the sum of its proper divisors (158898620).

189744388 is a wasteful number, since it uses less digits than its factorization.

189744388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12843 (or 12841 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 52.

The square root of 189744388 is about 13774.7736097549. The cubic root of 189744388 is about 574.6317874466.

The spelling of 189744388 in words is "one hundred eighty-nine million, seven hundred forty-four thousand, three hundred eighty-eight".