1331285760 has 288 divisors, whose sum is σ = 5400084480. Its totient is φ = 304238592.

The previous prime is 1331285729. The next prime is 1331285783. The reversal of 1331285760 is 675821331.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239169 + ... + 244671.

Almost surely, 2^1331285760 is an apocalyptic number.

1331285760 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 1331285760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2700042240).

1331285760 is an abundant number, since it is smaller than the sum of its proper divisors (4068798720).

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

1331285760 is an equidigital number, since it uses as much as digits as its factorization.

1331285760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5540 (or 5520 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1331285760 is about 36486.7888419905. The cubic root of 1331285760 is about 1100.0787161300.

The spelling of 1331285760 in words is "one billion, three hundred thirty-one million, two hundred eighty-five thousand, seven hundred sixty".