1325556320 has 96 divisors (see below), whose sum is σ = 3450607776. Its totient is φ = 477184000.

The previous prime is 1325556307. The next prime is 1325556367. The reversal of 1325556320 is 236555231.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174032 + ... + 181488.

It is an arithmetic number, because the mean of its divisors is an integer number (35943831).

Almost surely, 2^1325556320 is an apocalyptic number.

1325556320 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 1325556320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1725303888).

1325556320 is an abundant number, since it is smaller than the sum of its proper divisors (2125051456).

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

1325556320 is a wasteful number, since it uses less digits than its factorization.

1325556320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7584 (or 7576 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 1325556320 is about 36408.1902873516. The cubic root of 1325556320 is about 1098.4983145153.

The spelling of 1325556320 in words is "one billion, three hundred twenty-five million, five hundred fifty-six thousand, three hundred twenty".