1328181375 has 16 divisors (see below), whose sum is σ = 2210094432. Its totient is φ = 708363200.

The previous prime is 1328181343. The next prime is 1328181403. The reversal of 1328181375 is 5731818231.

It is not a de Polignac number, because 1328181375 - 2⁵ = 1328181343 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1770534 + ... + 1771283.

It is an arithmetic number, because the mean of its divisors is an integer number (138130902).

Almost surely, 2^1328181375 is an apocalyptic number.

1328181375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1328181375 is a deficient number, since it is larger than the sum of its proper divisors (881913057).

1328181375 is an equidigital number, since it uses as much as digits as its factorization.

1328181375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3541835 (or 3541825 counting only the distinct ones).

The product of its digits is 40320, while the sum is 39.

The square root of 1328181375 is about 36444.2227931945. Note that the first 3 decimals coincide. The cubic root of 1328181375 is about 1099.2229705268. Note that the first 3 decimals are identical.

The spelling of 1328181375 in words is "one billion, three hundred twenty-eight million, one hundred eighty-one thousand, three hundred seventy-five".