1720841280 has 56 divisors (see below), whose sum is σ = 5463674112. Its totient is φ = 458890752.

The previous prime is 1720841273. The next prime is 1720841323. The reversal of 1720841280 is 821480271.

It is a happy number.

It is a super-2 number, since 2×1720841280² = 5922589421904076800, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 895312 + ... + 897231.

Almost surely, 2^1720841280 is an apocalyptic number.

1720841280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1720841280 is an abundant number, since it is smaller than the sum of its proper divisors (3742832832).

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

1720841280 is a wasteful number, since it uses less digits than its factorization.

1720841280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792563 (or 1792553 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 1720841280 is about 41483.0239977753. The cubic root of 1720841280 is about 1198.3405952599.

The spelling of 1720841280 in words is "one billion, seven hundred twenty million, eight hundred forty-one thousand, two hundred eighty".