1329790275 has 54 divisors (see below), whose sum is σ = 2601879228. Its totient is φ = 643867200.

The previous prime is 1329790271. The next prime is 1329790309. The reversal of 1329790275 is 5720979231.

1329790275 is a `hidden beast` number, since 1 + 3 + 297 + 90 + 275 = 666.

It is not a de Polignac number, because 1329790275 - 2² = 1329790271 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1329790275.

It is not an unprimeable number, because it can be changed into a prime (1329790271) 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 53 ways as a sum of consecutive naturals, for example, 1813809 + ... + 1814541.

Almost surely, 2^1329790275 is an apocalyptic number.

1329790275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1329790275 is a deficient number, since it is larger than the sum of its proper divisors (1272088953).

1329790275 is an equidigital number, since it uses as much as digits as its factorization.

1329790275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 1329790275 is about 36466.2895699576. The cubic root of 1329790275 is about 1099.6666414090. Note that the first 4 decimals are identical.

The spelling of 1329790275 in words is "one billion, three hundred twenty-nine million, seven hundred ninety thousand, two hundred seventy-five".