1320311232 has 112 divisors (see below), whose sum is σ = 3921983520. Its totient is φ = 435511296.

The previous prime is 1320311227. The next prime is 1320311281. The reversal of 1320311232 is 2321130231.

1320311232 is a `hidden beast` number, since 1 + 320 + 311 + 2 + 32 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163678 + ... + 171554.

It is an arithmetic number, because the mean of its divisors is an integer number (35017710).

Almost surely, 2^1320311232 is an apocalyptic number.

1320311232 is a gapful number since it is divisible by the number (12) 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 1320311232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1960991760).

1320311232 is an abundant number, since it is smaller than the sum of its proper divisors (2601672288).

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

1320311232 is an equidigital number, since it uses as much as digits as its factorization.

1320311232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7995 (or 7979 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1320311232 is about 36336.0871861570. The cubic root of 1320311232 is about 1097.0475182222.

Adding to 1320311232 its reverse (2321130231), we get a palindrome (3641441463).

The spelling of 1320311232 in words is "one billion, three hundred twenty million, three hundred eleven thousand, two hundred thirty-two".