1328410821 has 16 divisors (see below), whose sum is σ = 1974110400. Its totient is φ = 789643008.

The previous prime is 1328410819. The next prime is 1328410823. The reversal of 1328410821 is 1280148231.

It is an interprime number because it is at equal distance from previous prime (1328410819) and next prime (1328410823).

It is not a de Polignac number, because 1328410821 - 2¹ = 1328410819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328410823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 684486 + ... + 686423.

It is an arithmetic number, because the mean of its divisors is an integer number (123381900).

Almost surely, 2^1328410821 is an apocalyptic number.

It is an amenable number.

1328410821 is a deficient number, since it is larger than the sum of its proper divisors (645699579).

1328410821 is a wasteful number, since it uses less digits than its factorization.

1328410821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370948.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 1328410821 is about 36447.3705635948. The cubic root of 1328410821 is about 1099.2862645408.

It can be divided in two parts, 1328410 and 821, that added together give a palindrome (1329231).

The spelling of 1328410821 in words is "one billion, three hundred twenty-eight million, four hundred ten thousand, eight hundred twenty-one".