1328948857 has 2 divisors, whose sum is σ = 1328948858. Its totient is φ = 1328948856.

The previous prime is 1328948843. The next prime is 1328948861. The reversal of 1328948857 is 7588498231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1010540521 + 318408336 = 31789^2 + 17844^2 .

It is a cyclic number.

It is not a de Polignac number, because 1328948857 - 2¹⁵ = 1328916089 is a prime.

It is a super-2 number, since 2×1328948857² = 3532210129043212898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1328948798 and 1328948807.

It is not a weakly prime, because it can be changed into another prime (1328948807) 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 as a sum of consecutive naturals, namely, 664474428 + 664474429.

It is an arithmetic number, because the mean of its divisors is an integer number (664474429).

Almost surely, 2^1328948857 is an apocalyptic number.

It is an amenable number.

1328948857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328948857 is an equidigital number, since it uses as much as digits as its factorization.

1328948857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 55.

The square root of 1328948857 is about 36454.7508152230. The cubic root of 1328948857 is about 1099.4346563240.

The spelling of 1328948857 in words is "one billion, three hundred twenty-eight million, nine hundred forty-eight thousand, eight hundred fifty-seven".