1328105428 has 36 divisors (see below), whose sum is σ = 2520838908. Its totient is φ = 611969280.

The previous prime is 1328105413. The next prime is 1328105477. The reversal of 1328105428 is 8245018231.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 721567044 + 606538384 = 26862^2 + 24628^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1328105393 and 1328105402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 553800 + ... + 556192.

It is an arithmetic number, because the mean of its divisors is an integer number (70023303).

Almost surely, 2^1328105428 is an apocalyptic number.

It is an amenable number.

1328105428 is a deficient number, since it is larger than the sum of its proper divisors (1192733480).

1328105428 is a wasteful number, since it uses less digits than its factorization.

1328105428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244 (or 3229 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 1328105428 is about 36443.1808161692. The cubic root of 1328105428 is about 1099.2020184993.

The spelling of 1328105428 in words is "one billion, three hundred twenty-eight million, one hundred five thousand, four hundred twenty-eight".