1330343857 has 8 divisors (see below), whose sum is σ = 1409907816. Its totient is φ = 1250925312.

The previous prime is 1330343849. The next prime is 1330343867. The reversal of 1330343857 is 7583430331.

It can be written as a sum of positive squares in 4 ways, for example, as 1114958881 + 215384976 = 33391^2 + 14676^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1330343857 - 2³ = 1330343849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1330343867) 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 7 ways as a sum of consecutive naturals, for example, 17218 + ... + 54379.

It is an arithmetic number, because the mean of its divisors is an integer number (176238477).

Almost surely, 2^1330343857 is an apocalyptic number.

1330343857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1330343857 is a deficient number, since it is larger than the sum of its proper divisors (79563959).

1330343857 is a wasteful number, since it uses less digits than its factorization.

1330343857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72707.

The product of its (nonzero) digits is 90720, while the sum is 37.

The square root of 1330343857 is about 36473.8791054640. The cubic root of 1330343857 is about 1099.8192146421.

The spelling of 1330343857 in words is "one billion, three hundred thirty million, three hundred forty-three thousand, eight hundred fifty-seven".