1810816 has 64 divisors (see below), whose sum is σ = 4308480. Its totient is φ = 741888.

The previous prime is 1810799. The next prime is 1810819. The reversal of 1810816 is 6180181.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1810819) 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, 38505 + ... + 38551.

It is an arithmetic number, because the mean of its divisors is an integer number (67320).

2^1810816 is an apocalyptic number.

1810816 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 1810816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2154240).

1810816 is an abundant number, since it is smaller than the sum of its proper divisors (2497664).

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

1810816 is an equidigital number, since it uses as much as digits as its factorization.

1810816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 1810816 is about 1345.6656345467. The cubic root of 1810816 is about 121.8872020218.

Adding to 1810816 its reverse (6180181), we get a palindrome (7990997).

The spelling of 1810816 in words is "one million, eight hundred ten thousand, eight hundred sixteen".