1840418 has 4 divisors (see below), whose sum is σ = 2760630. Its totient is φ = 920208.

The previous prime is 1840393. The next prime is 1840429. The reversal of 1840418 is 8140481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8140481 = 37 ⋅220013.

It can be written as a sum of positive squares in only one way, i.e., 1530169 + 310249 = 1237^2 + 557^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460103 + ... + 460106.

2^1840418 is an apocalyptic number.

1840418 is a deficient number, since it is larger than the sum of its proper divisors (920212).

1840418 is an equidigital number, since it uses as much as digits as its factorization.

1840418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920211.

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 1840418 is about 1356.6200647197. The cubic root of 1840418 is about 122.5477919865.

Adding to 1840418 its reverse (8140481), we get a palindrome (9980899).

The spelling of 1840418 in words is "one million, eight hundred forty thousand, four hundred eighteen".