1804020 has 48 divisors (see below), whose sum is σ = 5116608. Its totient is φ = 474880.

The previous prime is 1804013. The next prime is 1804037. The reversal of 1804020 is 204081.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6280 + ... + 6560.

It is an arithmetic number, because the mean of its divisors is an integer number (106596).

2^1804020 is an apocalyptic number.

1804020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1804020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2558304).

1804020 is an abundant number, since it is smaller than the sum of its proper divisors (3312588).

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

1804020 is a wasteful number, since it uses less digits than its factorization.

1804020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 1804020 is about 1343.1381165018. The cubic root of 1804020 is about 121.7345298099.

The spelling of 1804020 in words is "one million, eight hundred four thousand, twenty".