1720488 has 128 divisors (see below), whose sum is σ = 5760000. Its totient is φ = 423360.

The previous prime is 1720471. The next prime is 1720513. The reversal of 1720488 is 8840271.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 90543 + ... + 90561.

It is an arithmetic number, because the mean of its divisors is an integer number (45000).

2^1720488 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 1720488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2880000).

1720488 is an abundant number, since it is smaller than the sum of its proper divisors (4039512).

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

1720488 is a wasteful number, since it uses less digits than its factorization.

1720488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 1720488 is about 1311.6737399216. The cubic root of 1720488 is about 119.8258585229.

The spelling of 1720488 in words is "one million, seven hundred twenty thousand, four hundred eighty-eight".