1806406 has 16 divisors (see below), whose sum is σ = 3260160. Its totient is φ = 733320.

The previous prime is 1806383. The next prime is 1806407. The reversal of 1806406 is 6046081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1806407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3130 + ... + 3661.

It is an arithmetic number, because the mean of its divisors is an integer number (203760).

2^1806406 is an apocalyptic number.

1806406 is a deficient number, since it is larger than the sum of its proper divisors (1453754).

1806406 is a wasteful number, since it uses less digits than its factorization.

1806406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1806406 is about 1344.0260414144. The cubic root of 1806406 is about 121.7881749336.

The spelling of 1806406 in words is "one million, eight hundred six thousand, four hundred six".