1326816 has 72 divisors (see below), whose sum is σ = 4009824. Its totient is φ = 414720.

The previous prime is 1326797. The next prime is 1326817. The reversal of 1326816 is 6186231.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1326816.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4761 + ... + 5031.

It is an arithmetic number, because the mean of its divisors is an integer number (55692).

2^1326816 is an apocalyptic number.

1326816 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 1326816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2004912).

1326816 is an abundant number, since it is smaller than the sum of its proper divisors (2683008).

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

1326816 is a wasteful number, since it uses less digits than its factorization.

1326816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 293 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1326816 is about 1151.8749932176. The cubic root of 1326816 is about 109.8846173055.

The spelling of 1326816 in words is "one million, three hundred twenty-six thousand, eight hundred sixteen".