1840404 has 24 divisors (see below), whose sum is σ = 4338880. Its totient is φ = 607104.

The previous prime is 1840393. The next prime is 1840429. The reversal of 1840404 is 4040481.

1840404 is a modest number, since divided by 404 gives 184 as remainder.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492 + ... + 1980.

2^1840404 is an apocalyptic number.

It is an amenable number.

1840404 is an abundant number, since it is smaller than the sum of its proper divisors (2498476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1840404 is a wasteful number, since it uses less digits than its factorization.

1840404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1599 (or 1597 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1840404 is about 1356.6149048275. The cubic root of 1840404 is about 122.5474812467.

Adding to 1840404 its reverse (4040481), we get a palindrome (5880885).

The spelling of 1840404 in words is "one million, eight hundred forty thousand, four hundred four".