1720560285 has 112 divisors (see below), whose sum is σ = 3288705840. Its totient is φ = 862202880.

The previous prime is 1720560277. The next prime is 1720560311. The reversal of 1720560285 is 5820650271.

It is a happy number.

1720560285 is a `hidden beast` number, since 1 + 72 + 0 + 560 + 28 + 5 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 108618084 + 1611942201 = 10422^2 + 40149^2 .

It is not a de Polignac number, because 1720560285 - 2³ = 1720560277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 4333707 + ... + 4334103.

It is an arithmetic number, because the mean of its divisors is an integer number (29363445).

Almost surely, 2^1720560285 is an apocalyptic number.

1720560285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1720560285 is a deficient number, since it is larger than the sum of its proper divisors (1568145555).

1720560285 is an equidigital number, since it uses as much as digits as its factorization.

1720560285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 475 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 1720560285 is about 41479.6369921435. The cubic root of 1720560285 is about 1198.2753663029.

The spelling of 1720560285 in words is "one billion, seven hundred twenty million, five hundred sixty thousand, two hundred eighty-five".