1836020 has 12 divisors (see below), whose sum is σ = 3855684. Its totient is φ = 734400.

The previous prime is 1836011. The next prime is 1836031. The reversal of 1836020 is 206381.

It can be written as a sum of positive squares in 2 ways, for example, as 729316 + 1106704 = 854^2 + 1052^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 91801 = 1836020 / (1 + 8 + 3 + 6 + 0 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1835983 and 1836001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45881 + ... + 45920.

It is an arithmetic number, because the mean of its divisors is an integer number (321307).

2^1836020 is an apocalyptic number.

1836020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1836020 is an abundant number, since it is smaller than the sum of its proper divisors (2019664).

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

1836020 is a wasteful number, since it uses less digits than its factorization.

1836020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91810 (or 91808 counting only the distinct ones).

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

The square root of 1836020 is about 1354.9981549803. The cubic root of 1836020 is about 122.4500976806.

The spelling of 1836020 in words is "one million, eight hundred thirty-six thousand, twenty".