1328078992 has 20 divisors (see below), whose sum is σ = 2599683436. Its totient is φ = 657192960.

The previous prime is 1328078987. The next prime is 1328079001. The reversal of 1328078992 is 2998708231.

It can be written as a sum of positive squares in 2 ways, for example, as 946423696 + 381655296 = 30764^2 + 19536^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426309 + ... + 429412.

Almost surely, 2^1328078992 is an apocalyptic number.

It is an amenable number.

1328078992 is a deficient number, since it is larger than the sum of its proper divisors (1271604444).

1328078992 is an equidigital number, since it uses as much as digits as its factorization.

1328078992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855826 (or 855820 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 1328078992 is about 36442.8181127640. The cubic root of 1328078992 is about 1099.1947252285.

The spelling of 1328078992 in words is "one billion, three hundred twenty-eight million, seventy-eight thousand, nine hundred ninety-two".