1806816 has 96 divisors (see below), whose sum is σ = 5443200. Its totient is φ = 519680.

The previous prime is 1806803. The next prime is 1806839. The reversal of 1806816 is 6186081.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30595 + ... + 30653.

It is an arithmetic number, because the mean of its divisors is an integer number (56700).

2^1806816 is an apocalyptic number.

1806816 is a gapful number since it is divisible by the number (16) 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 1806816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2721600).

1806816 is an abundant number, since it is smaller than the sum of its proper divisors (3636384).

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

1806816 is a wasteful number, since it uses less digits than its factorization.

1806816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 1806816 is about 1344.1785595671. The cubic root of 1806816 is about 121.7973883246.

It can be divided in two parts, 180 and 6816, that added together give a palindrome (6996).

The spelling of 1806816 in words is "one million, eight hundred six thousand, eight hundred sixteen".