189155144 has 16 divisors (see below), whose sum is σ = 360481020. Its totient is φ = 93026880.

The previous prime is 189155101. The next prime is 189155159. The reversal of 189155144 is 441551981.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 188732644 + 422500 = 13738^2 + 650^2 .

It is a junction number, because it is equal to n+sod(n) for n = 189155098 and 189155107.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193319 + ... + 194294.

Almost surely, 2^189155144 is an apocalyptic number.

It is an amenable number.

189155144 is a deficient number, since it is larger than the sum of its proper divisors (171325876).

189155144 is a wasteful number, since it uses less digits than its factorization.

189155144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387680 (or 387676 counting only the distinct ones).

The product of its digits is 28800, while the sum is 38.

The square root of 189155144 is about 13753.3684601264. The cubic root of 189155144 is about 574.0363382321.

The spelling of 189155144 in words is "one hundred eighty-nine million, one hundred fifty-five thousand, one hundred forty-four".