1720668928 has 36 divisors (see below), whose sum is σ = 3746860488. Its totient is φ = 782120960.

The previous prime is 1720668881. The next prime is 1720668931. The reversal of 1720668928 is 8298660271.

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 3 ways as a sum of consecutive naturals, for example, 302701 + ... + 308332.

It is an arithmetic number, because the mean of its divisors is an integer number (104079458).

Almost surely, 2^1720668928 is an apocalyptic number.

It is an amenable number.

1720668928 is an abundant number, since it is smaller than the sum of its proper divisors (2026191560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1720668928 is an equidigital number, since it uses as much as digits as its factorization.

1720668928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611060 (or 611046 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 1720668928 is about 41480.9465658632. The cubic root of 1720668928 is about 1198.3005870584.

The spelling of 1720668928 in words is "one billion, seven hundred twenty million, six hundred sixty-eight thousand, nine hundred twenty-eight".