1820726 has 8 divisors (see below), whose sum is σ = 2849904. Its totient is φ = 870760.

The previous prime is 1820711. The next prime is 1820737. The reversal of 1820726 is 6270281.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1820695 and 1820704.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 19745 + ... + 19836.

It is an arithmetic number, because the mean of its divisors is an integer number (356238).

2^1820726 is an apocalyptic number.

1820726 is a deficient number, since it is larger than the sum of its proper divisors (1029178).

1820726 is a wasteful number, since it uses less digits than its factorization.

1820726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39606.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1820726 is about 1349.3428029971. The cubic root of 1820726 is about 122.1091471492.

The spelling of 1820726 in words is "one million, eight hundred twenty thousand, seven hundred twenty-six".