1320947320 has 192 divisors, whose sum is σ = 3775242240. Its totient is φ = 407151360.

The previous prime is 1320947263. The next prime is 1320947359. The reversal of 1320947320 is 237490231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4302607 + ... + 4302913.

It is an arithmetic number, because the mean of its divisors is an integer number (19662720).

Almost surely, 2^1320947320 is an apocalyptic number.

1320947320 is a gapful number since it is divisible by the number (10) 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 1320947320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1887621120).

1320947320 is an abundant number, since it is smaller than the sum of its proper divisors (2454294920).

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

1320947320 is a wasteful number, since it uses less digits than its factorization.

1320947320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 1320947320 is about 36344.8389733673. The cubic root of 1320947320 is about 1097.2236652578.

The spelling of 1320947320 in words is "one billion, three hundred twenty million, nine hundred forty-seven thousand, three hundred twenty".