1820056 has 24 divisors (see below), whose sum is σ = 3970620. Its totient is φ = 779856.

The previous prime is 1820051. The next prime is 1820087. The reversal of 1820056 is 6500281.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1930 + ... + 2713.

2^1820056 is an apocalyptic number.

It is an amenable number.

1820056 is an abundant number, since it is smaller than the sum of its proper divisors (2150564).

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

1820056 is a wasteful number, since it uses less digits than its factorization.

1820056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4663 (or 4652 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 1820056 is about 1349.0945111444. The cubic root of 1820056 is about 122.0941671969.

The spelling of 1820056 in words is "one million, eight hundred twenty thousand, fifty-six".