1330605640 has 128 divisors (see below), whose sum is σ = 3901685760. Its totient is φ = 396324864.

The previous prime is 1330605607. The next prime is 1330605643. The reversal of 1330605640 is 465060331.

It is a super-2 number, since 2×1330605640² = 3541022738399619200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1330605599 and 1330605608.

It is not an unprimeable number, because it can be changed into a prime (1330605643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51129 + ... + 72631.

It is an arithmetic number, because the mean of its divisors is an integer number (30481920).

Almost surely, 2^1330605640 is an apocalyptic number.

1330605640 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 1330605640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1950842880).

1330605640 is an abundant number, since it is smaller than the sum of its proper divisors (2571080120).

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

1330605640 is a wasteful number, since it uses less digits than its factorization.

1330605640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21551 (or 21547 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 1330605640 is about 36477.4675656082. The cubic root of 1330605640 is about 1099.8913501503.

Adding to 1330605640 its reverse (465060331), we get a palindrome (1795665971).

The spelling of 1330605640 in words is "one billion, three hundred thirty million, six hundred five thousand, six hundred forty".