1325329280 has 128 divisors (see below), whose sum is σ = 3501619200. Its totient is φ = 475637760.

The previous prime is 1325329259. The next prime is 1325329283. The reversal of 1325329280 is 829235231.

It is a tau number, because it is divible by the number of its divisors (128).

It is a self number, because there is not a number n which added to its sum of digits gives 1325329280.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325329283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554969 + ... + 557351.

It is an arithmetic number, because the mean of its divisors is an integer number (27356400).

Almost surely, 2^1325329280 is an apocalyptic number.

1325329280 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 1325329280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1750809600).

1325329280 is an abundant number, since it is smaller than the sum of its proper divisors (2176289920).

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

1325329280 is a wasteful number, since it uses less digits than its factorization.

1325329280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2492 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1325329280 is about 36405.0721740804. The cubic root of 1325329280 is about 1098.4355943593.

The spelling of 1325329280 in words is "one billion, three hundred twenty-five million, three hundred twenty-nine thousand, two hundred eighty".