189399208 has 8 divisors (see below), whose sum is σ = 355123530. Its totient is φ = 94699600.

The previous prime is 189399191. The next prime is 189399211. The reversal of 189399208 is 802993981.

It can be written as a sum of positive squares in only one way, i.e., 186650244 + 2748964 = 13662^2 + 1658^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11837443 + ... + 11837458.

Almost surely, 2^189399208 is an apocalyptic number.

It is an amenable number.

189399208 is a deficient number, since it is larger than the sum of its proper divisors (165724322).

189399208 is a wasteful number, since it uses less digits than its factorization.

189399208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23674907 (or 23674903 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 189399208 is about 13762.2384807124. The cubic root of 189399208 is about 574.2831222354.

It can be divided in two parts, 1893 and 99208, that added together give a palindrome (101101).

The spelling of 189399208 in words is "one hundred eighty-nine million, three hundred ninety-nine thousand, two hundred eight".