1321608928 has 12 divisors (see below), whose sum is σ = 2601917640. Its totient is φ = 660804448.

The previous prime is 1321608919. The next prime is 1321608929. The reversal of 1321608928 is 8298061231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321608929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20650108 + ... + 20650171.

It is an arithmetic number, because the mean of its divisors is an integer number (216826470).

Almost surely, 2^1321608928 is an apocalyptic number.

It is an amenable number.

1321608928 is a deficient number, since it is larger than the sum of its proper divisors (1280308712).

1321608928 is an equidigital number, since it uses as much as digits as its factorization.

1321608928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41300289 (or 41300281 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 1321608928 is about 36353.9396489569. The cubic root of 1321608928 is about 1097.4068193678.

The spelling of 1321608928 in words is "one billion, three hundred twenty-one million, six hundred eight thousand, nine hundred twenty-eight".