189286138 has 4 divisors (see below), whose sum is σ = 283929210. Its totient is φ = 94643068.

The previous prime is 189286121. The next prime is 189286199. The reversal of 189286138 is 831682981.

189286138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 144168049 + 45118089 = 12007^2 + 6717^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47321533 + ... + 47321536.

Almost surely, 2^189286138 is an apocalyptic number.

189286138 is a deficient number, since it is larger than the sum of its proper divisors (94643072).

189286138 is an equidigital number, since it uses as much as digits as its factorization.

189286138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94643071.

The product of its digits is 165888, while the sum is 46.

The square root of 189286138 is about 13758.1298874520. The cubic root of 189286138 is about 574.1688184863.

The spelling of 189286138 in words is "one hundred eighty-nine million, two hundred eighty-six thousand, one hundred thirty-eight".