1803620 has 48 divisors (see below), whose sum is σ = 4666368. Its totient is φ = 570240.

The previous prime is 1803583. The next prime is 1803629. The reversal of 1803620 is 263081.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1803592 and 1803601.

It is not an unprimeable number, because it can be changed into a prime (1803629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1325 + ... + 2315.

It is an arithmetic number, because the mean of its divisors is an integer number (97216).

2^1803620 is an apocalyptic number.

1803620 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 1803620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2333184).

1803620 is an abundant number, since it is smaller than the sum of its proper divisors (2862748).

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

1803620 is a wasteful number, since it uses less digits than its factorization.

1803620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020 (or 1018 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1803620 is about 1342.9892032328. The cubic root of 1803620 is about 121.7255318662.

The spelling of 1803620 in words is "one million, eight hundred three thousand, six hundred twenty".