1804420 has 24 divisors (see below), whose sum is σ = 3838464. Its totient is φ = 712416.

The previous prime is 1804403. The next prime is 1804421. The reversal of 1804420 is 244081.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1804421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1117 + ... + 2203.

It is an arithmetic number, because the mean of its divisors is an integer number (159936).

2^1804420 is an apocalyptic number.

1804420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1804420 is an abundant number, since it is smaller than the sum of its proper divisors (2034044).

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

1804420 is a wasteful number, since it uses less digits than its factorization.

1804420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1804420 is about 1343.2870132626. The cubic root of 1804420 is about 121.7435264236.

The spelling of 1804420 in words is "one million, eight hundred four thousand, four hundred twenty".