189986146 has 8 divisors (see below), whose sum is σ = 325690560. Its totient is φ = 81422628.

The previous prime is 189986143. The next prime is 189986179. The reversal of 189986146 is 641689981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 189986093 and 189986102.

It is not an unprimeable number, because it can be changed into a prime (189986143) 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, 6785206 + ... + 6785233.

It is an arithmetic number, because the mean of its divisors is an integer number (40711320).

Almost surely, 2^189986146 is an apocalyptic number.

189986146 is a deficient number, since it is larger than the sum of its proper divisors (135704414).

189986146 is a wasteful number, since it uses less digits than its factorization.

189986146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13570448.

The product of its digits is 746496, while the sum is 52.

The square root of 189986146 is about 13783.5462055307. The cubic root of 189986146 is about 574.8757347092.

The spelling of 189986146 in words is "one hundred eighty-nine million, nine hundred eighty-six thousand, one hundred forty-six".