1720128922 has 16 divisors (see below), whose sum is σ = 2732565312. Its totient is φ = 810390240.

The previous prime is 1720128913. The next prime is 1720128929. The reversal of 1720128922 is 2298210271.

It is not an unprimeable number, because it can be changed into a prime (1720128929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275979 + ... + 282142.

It is an arithmetic number, because the mean of its divisors is an integer number (170785332).

Almost surely, 2^1720128922 is an apocalyptic number.

1720128922 is a deficient number, since it is larger than the sum of its proper divisors (1012436390).

1720128922 is a wasteful number, since it uses less digits than its factorization.

1720128922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558213.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 1720128922 is about 41474.4369702592. The cubic root of 1720128922 is about 1198.1752177517.

The spelling of 1720128922 in words is "one billion, seven hundred twenty million, one hundred twenty-eight thousand, nine hundred twenty-two".