1720368885 has 16 divisors (see below), whose sum is σ = 2847507840. Its totient is φ = 885890880.

The previous prime is 1720368863. The next prime is 1720368887. The reversal of 1720368885 is 5888630271.

It is not a de Polignac number, because 1720368885 - 2⁷ = 1720368757 is a prime.

It is a super-2 number, since 2×1720368885² = 5919338200952286450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1720368887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1977001 + ... + 1977870.

It is an arithmetic number, because the mean of its divisors is an integer number (177969240).

Almost surely, 2^1720368885 is an apocalyptic number.

1720368885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1720368885 is a deficient number, since it is larger than the sum of its proper divisors (1127138955).

1720368885 is a wasteful number, since it uses less digits than its factorization.

1720368885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3954908.

The product of its (nonzero) digits is 645120, while the sum is 48.

The square root of 1720368885 is about 41477.3297718163. The cubic root of 1720368885 is about 1198.2309314732.

The spelling of 1720368885 in words is "one billion, seven hundred twenty million, three hundred sixty-eight thousand, eight hundred eighty-five".