1806860 has 48 divisors (see below), whose sum is σ = 4257792. Its totient is φ = 638400.

The previous prime is 1806859. The next prime is 1806863. The reversal of 1806860 is 686081.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1806863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9365 + ... + 9555.

It is an arithmetic number, because the mean of its divisors is an integer number (88704).

2^1806860 is an apocalyptic number.

1806860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1806860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2128896).

1806860 is an abundant number, since it is smaller than the sum of its proper divisors (2450932).

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

1806860 is a wasteful number, since it uses less digits than its factorization.

1806860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 1806860 is about 1344.1949263407. The cubic root of 1806860 is about 121.7983769960.

The spelling of 1806860 in words is "one million, eight hundred six thousand, eight hundred sixty".