1720000056 has 64 divisors (see below), whose sum is σ = 4424878080. Its totient is φ = 556744320.

The previous prime is 1720000031. The next prime is 1720000127. The reversal of 1720000056 is 6500000271.

It is a junction number, because it is equal to n+sod(n) for n = 1719999987 and 1720000041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 537421 + ... + 540611.

It is an arithmetic number, because the mean of its divisors is an integer number (69138720).

Almost surely, 2^1720000056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1720000056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2212439040).

1720000056 is an abundant number, since it is smaller than the sum of its proper divisors (2704878024).

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

1720000056 is a wasteful number, since it uses less digits than its factorization.

1720000056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3844 (or 3840 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 1720000056 is about 41472.8833817954. The cubic root of 1720000056 is about 1198.1452959821.

The spelling of 1720000056 in words is "one billion, seven hundred twenty million, fifty-six", and thus it is an aban number.