1805706 has 64 divisors (see below), whose sum is σ = 4872960. Its totient is φ = 483840.

The previous prime is 1805701. The next prime is 1805729. The reversal of 1805706 is 6075081.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1805706.

It is not an unprimeable number, because it can be changed into a prime (1805701) 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 31 ways as a sum of consecutive naturals, for example, 6286 + ... + 6566.

It is an arithmetic number, because the mean of its divisors is an integer number (76140).

2^1805706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1805706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2436480).

1805706 is an abundant number, since it is smaller than the sum of its proper divisors (3067254).

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

1805706 is a wasteful number, since it uses less digits than its factorization.

1805706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1805706 is about 1343.7656045606. The cubic root of 1805706 is about 121.7724415314.

It can be divided in two parts, 180 and 5706, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 1805706 in words is "one million, eight hundred five thousand, seven hundred six".