1326390 has 64 divisors (see below), whose sum is σ = 3628800. Its totient is φ = 307584.

The previous prime is 1326389. The next prime is 1326419. The reversal of 1326390 is 936231.

It is a self number, because there is not a number n which added to its sum of digits gives 1326390.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7321 + ... + 7499.

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

2^1326390 is an apocalyptic number.

1326390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1326390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1814400).

1326390 is an abundant number, since it is smaller than the sum of its proper divisors (2302410).

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

1326390 is a wasteful number, since it uses less digits than its factorization.

1326390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 1326390 is about 1151.6900624734. The cubic root of 1326390 is about 109.8728558511.

The spelling of 1326390 in words is "one million, three hundred twenty-six thousand, three hundred ninety".