189231236 has 12 divisors (see below), whose sum is σ = 339231900. Its totient is φ = 92307840.

The previous prime is 189231197. The next prime is 189231239. The reversal of 189231236 is 632132981.

It can be written as a sum of positive squares in 2 ways, for example, as 95257600 + 93973636 = 9760^2 + 9694^2 .

It is a junction number, because it is equal to n+sod(n) for n = 189231196 and 189231205.

It is not an unprimeable number, because it can be changed into a prime (189231239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 576761 + ... + 577088.

It is an arithmetic number, because the mean of its divisors is an integer number (28269325).

Almost surely, 2^189231236 is an apocalyptic number.

It is an amenable number.

189231236 is a deficient number, since it is larger than the sum of its proper divisors (150000664).

189231236 is a wasteful number, since it uses less digits than its factorization.

189231236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153894 (or 1153892 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 189231236 is about 13756.1344861120. The cubic root of 189231236 is about 574.1133010123.

The spelling of 189231236 in words is "one hundred eighty-nine million, two hundred thirty-one thousand, two hundred thirty-six".