190820786 has 16 divisors (see below), whose sum is σ = 308798784. Its totient is φ = 87914064.

The previous prime is 190820771. The next prime is 190820789. The reversal of 190820786 is 687028091.

190820786 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (190820789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9011 + ... + 21513.

It is an arithmetic number, because the mean of its divisors is an integer number (19299924).

Almost surely, 2^190820786 is an apocalyptic number.

190820786 is a deficient number, since it is larger than the sum of its proper divisors (117977998).

190820786 is a wasteful number, since it uses less digits than its factorization.

190820786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13105.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 190820786 is about 13813.7897044946. The cubic root of 190820786 is about 575.7163457558.

The spelling of 190820786 in words is "one hundred ninety million, eight hundred twenty thousand, seven hundred eighty-six".