1320447744 has 360 divisors, whose sum is σ = 4914822528. Its totient is φ = 342558720.

The previous prime is 1320447727. The next prime is 1320447803. The reversal of 1320447744 is 4477440231.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1320447699 and 1320447708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1596259 + ... + 1597085.

Almost surely, 2^1320447744 is an apocalyptic number.

1320447744 is a gapful number since it is divisible by the number (14) 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 1320447744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2457411264).

1320447744 is an abundant number, since it is smaller than the sum of its proper divisors (3594374784).

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

1320447744 is an equidigital number, since it uses as much as digits as its factorization.

1320447744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 850 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 36.

The square root of 1320447744 is about 36337.9656007322. The cubic root of 1320447744 is about 1097.0853262244.

Adding to 1320447744 its reverse (4477440231), we get a palindrome (5797887975).

The spelling of 1320447744 in words is "one billion, three hundred twenty million, four hundred forty-seven thousand, seven hundred forty-four".