1840018 has 8 divisors (see below), whose sum is σ = 2787660. Its totient is φ = 910800.

The previous prime is 1839997. The next prime is 1840019. The reversal of 1840018 is 8100481.

It can be written as a sum of positive squares in 2 ways, for example, as 1830609 + 9409 = 1353^2 + 97^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1840019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4353 + ... + 4756.

2^1840018 is an apocalyptic number.

1840018 is a deficient number, since it is larger than the sum of its proper divisors (947642).

1840018 is a wasteful number, since it uses less digits than its factorization.

1840018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9212.

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 1840018 is about 1356.4726314969. The cubic root of 1840018 is about 122.5389130854.

Adding to 1840018 its reverse (8100481), we get a palindrome (9940499).

The spelling of 1840018 in words is "one million, eight hundred forty thousand, eighteen".