1320397824 has 44 divisors (see below), whose sum is σ = 3519349784. Its totient is φ = 440131584.

The previous prime is 1320397817. The next prime is 1320397829. The reversal of 1320397824 is 4287930231.

It is not an unprimeable number, because it can be changed into a prime (1320397829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211837 + ... + 217980.

Almost surely, 2^1320397824 is an apocalyptic number.

It is an amenable number.

1320397824 is an abundant number, since it is smaller than the sum of its proper divisors (2198951960).

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

1320397824 is an equidigital number, since it uses as much as digits as its factorization.

1320397824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429840 (or 429822 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 1320397824 is about 36337.2787093365. The cubic root of 1320397824 is about 1097.0715008156.

The spelling of 1320397824 in words is "one billion, three hundred twenty million, three hundred ninety-seven thousand, eight hundred twenty-four".