1906385 has 16 divisors (see below), whose sum is σ = 2493120. Its totient is φ = 1391040.

The previous prime is 1906381. The next prime is 1906391. The reversal of 1906385 is 5836091.

It is not a de Polignac number, because 1906385 - 2² = 1906381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1906381) 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 15 ways as a sum of consecutive naturals, for example, 8930 + ... + 9140.

It is an arithmetic number, because the mean of its divisors is an integer number (155820).

2^1906385 is an apocalyptic number.

It is an amenable number.

1906385 is a deficient number, since it is larger than the sum of its proper divisors (586735).

1906385 is a wasteful number, since it uses less digits than its factorization.

1906385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 1906385 is about 1380.7190155857. The cubic root of 1906385 is about 123.9948185487.

The spelling of 1906385 in words is "one million, nine hundred six thousand, three hundred eighty-five".