1840085 has 8 divisors (see below), whose sum is σ = 2378040. Its totient is φ = 1358784.

The previous prime is 1840073. The next prime is 1840087. The reversal of 1840085 is 5800481.

It can be written as a sum of positive squares in 4 ways, for example, as 14884 + 1825201 = 122^2 + 1351^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1840085 - 2¹⁸ = 1577941 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840087) 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 7 ways as a sum of consecutive naturals, for example, 14090 + ... + 14219.

It is an arithmetic number, because the mean of its divisors is an integer number (297255).

2^1840085 is an apocalyptic number.

It is an amenable number.

1840085 is a deficient number, since it is larger than the sum of its proper divisors (537955).

1840085 is a wasteful number, since it uses less digits than its factorization.

1840085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28327.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 1840085 is about 1356.4973276789. The cubic root of 1840085 is about 122.5404003910.

The spelling of 1840085 in words is "one million, eight hundred forty thousand, eighty-five".