1328403028 has 6 divisors (see below), whose sum is σ = 2324705306. Its totient is φ = 664201512.

The previous prime is 1328403017. The next prime is 1328403061. The reversal of 1328403028 is 8203048231.

It can be written as a sum of positive squares in only one way, i.e., 830131344 + 498271684 = 28812^2 + 22322^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166050375 + ... + 166050382.

Almost surely, 2^1328403028 is an apocalyptic number.

It is an amenable number.

1328403028 is a deficient number, since it is larger than the sum of its proper divisors (996302278).

1328403028 is a wasteful number, since it uses less digits than its factorization.

1328403028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332100761 (or 332100759 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 1328403028 is about 36447.2636558631. The cubic root of 1328403028 is about 1099.2841149160.

The spelling of 1328403028 in words is "one billion, three hundred twenty-eight million, four hundred three thousand, twenty-eight".