1328783425 has 6 divisors (see below), whose sum is σ = 1647691478. Its totient is φ = 1063026720.

The previous prime is 1328783419. The next prime is 1328783441. The reversal of 1328783425 is 5243878231.

It can be written as a sum of positive squares in 3 ways, for example, as 372798864 + 955984561 = 19308^2 + 30919^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1328783425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26575644 + ... + 26575693.

Almost surely, 2^1328783425 is an apocalyptic number.

It is an amenable number.

1328783425 is a deficient number, since it is larger than the sum of its proper divisors (318908053).

1328783425 is an equidigital number, since it uses as much as digits as its factorization.

1328783425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53151347 (or 53151342 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 1328783425 is about 36452.4817399310. The cubic root of 1328783425 is about 1099.3890339961.

The spelling of 1328783425 in words is "one billion, three hundred twenty-eight million, seven hundred eighty-three thousand, four hundred twenty-five".