189466785 has 48 divisors (see below), whose sum is σ = 354363984. Its totient is φ = 93290496.

The previous prime is 189466777. The next prime is 189466789. The reversal of 189466785 is 587664981.

It can be written as a sum of positive squares in 8 ways, for example, as 40602384 + 148864401 = 6372^2 + 12201^2 .

It is not a de Polignac number, because 189466785 - 2³ = 189466777 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (189466789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38209 + ... + 42881.

It is an arithmetic number, because the mean of its divisors is an integer number (7382583).

Almost surely, 2^189466785 is an apocalyptic number.

189466785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189466785 is a deficient number, since it is larger than the sum of its proper divisors (164897199).

189466785 is a wasteful number, since it uses less digits than its factorization.

189466785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4754 (or 4751 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 189466785 is about 13764.6934219401. The cubic root of 189466785 is about 574.3514148756.

The spelling of 189466785 in words is "one hundred eighty-nine million, four hundred sixty-six thousand, seven hundred eighty-five".