1820536 has 8 divisors (see below), whose sum is σ = 3413520. Its totient is φ = 910264.

The previous prime is 1820527. The next prime is 1820549. The reversal of 1820536 is 6350281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1820536.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 113776 + ... + 113791.

It is an arithmetic number, because the mean of its divisors is an integer number (426690).

2^1820536 is an apocalyptic number.

It is an amenable number.

1820536 is a deficient number, since it is larger than the sum of its proper divisors (1592984).

1820536 is a wasteful number, since it uses less digits than its factorization.

1820536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227573 (or 227569 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1820536 is about 1349.2723965160. The cubic root of 1820536 is about 122.1048994764.

The spelling of 1820536 in words is "one million, eight hundred twenty thousand, five hundred thirty-six".