1802020 has 24 divisors (see below), whose sum is σ = 4128768. Its totient is φ = 655200.

The previous prime is 1801997. The next prime is 1802029. The reversal of 1802020 is 202081.

1802020 is a modest number, since divided by 2020 gives 180 as remainder.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (1802029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3876 + ... + 4315.

It is an arithmetic number, because the mean of its divisors is an integer number (172032).

2^1802020 is an apocalyptic number.

1802020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1802020 is an abundant number, since it is smaller than the sum of its proper divisors (2326748).

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

1802020 is a wasteful number, since it uses less digits than its factorization.

1802020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8211 (or 8209 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1802020 is about 1342.3933849658. The cubic root of 1802020 is about 121.6895267818.

The spelling of 1802020 in words is "one million, eight hundred two thousand, twenty".