189995816 has 8 divisors (see below), whose sum is σ = 356242170. Its totient is φ = 94997904.

The previous prime is 189995803. The next prime is 189995833. The reversal of 189995816 is 618599981.

It can be written as a sum of positive squares in only one way, i.e., 185776900 + 4218916 = 13630^2 + 2054^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11874731 + ... + 11874746.

Almost surely, 2^189995816 is an apocalyptic number.

It is an amenable number.

189995816 is a deficient number, since it is larger than the sum of its proper divisors (166246354).

189995816 is a wasteful number, since it uses less digits than its factorization.

189995816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23749483 (or 23749479 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 56.

The square root of 189995816 is about 13783.8969816232. The cubic root of 189995816 is about 574.8854879713.

The spelling of 189995816 in words is "one hundred eighty-nine million, nine hundred ninety-five thousand, eight hundred sixteen".