1916385 has 16 divisors (see below), whose sum is σ = 3084480. Its totient is φ = 1016000.

The previous prime is 1916371. The next prime is 1916413. The reversal of 1916385 is 5836191.

It is not a de Polignac number, because 1916385 - 2⁵ = 1916353 is a prime.

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 in 15 ways as a sum of consecutive naturals, for example, 3511 + ... + 4019.

It is an arithmetic number, because the mean of its divisors is an integer number (192780).

2^1916385 is an apocalyptic number.

1916385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1916385 is a deficient number, since it is larger than the sum of its proper divisors (1168095).

1916385 is a wasteful number, since it uses less digits than its factorization.

1916385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768.

The product of its digits is 6480, while the sum is 33.

The square root of 1916385 is about 1384.3355807029. The cubic root of 1916385 is about 124.2112467482.

The spelling of 1916385 in words is "one million, nine hundred sixteen thousand, three hundred eighty-five".