1330640784 has 160 divisors (see below), whose sum is σ = 4219313280. Its totient is φ = 403107840.

The previous prime is 1330640767. The next prime is 1330640789. The reversal of 1330640784 is 4870460331.

1330640784 is a `hidden beast` number, since 1 + 3 + 3 + 0 + 640 + 7 + 8 + 4 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330640789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383184 + ... + 386640.

It is an arithmetic number, because the mean of its divisors is an integer number (26370708).

Almost surely, 2^1330640784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1330640784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2109656640).

1330640784 is an abundant number, since it is smaller than the sum of its proper divisors (2888672496).

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

1330640784 is an equidigital number, since it uses as much as digits as its factorization.

1330640784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3497 (or 3473 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 1330640784 is about 36477.9492844650. The cubic root of 1330640784 is about 1099.9010335205.

The spelling of 1330640784 in words is "one billion, three hundred thirty million, six hundred forty thousand, seven hundred eighty-four".