1328520499 has 8 divisors (see below), whose sum is σ = 1369942560. Its totient is φ = 1287528000.

The previous prime is 1328520497. The next prime is 1328520509. The reversal of 1328520499 is 9940258231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1328520499 - 2¹ = 1328520497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1328520491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101104 + ... + 113485.

It is an arithmetic number, because the mean of its divisors is an integer number (171242820).

Almost surely, 2^1328520499 is an apocalyptic number.

1328520499 is a deficient number, since it is larger than the sum of its proper divisors (41422061).

1328520499 is a wasteful number, since it uses less digits than its factorization.

1328520499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214781.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 1328520499 is about 36448.8751403936. The cubic root of 1328520499 is about 1099.3165172807.

The spelling of 1328520499 in words is "one billion, three hundred twenty-eight million, five hundred twenty thousand, four hundred ninety-nine".