1720448 has 16 divisors (see below), whose sum is σ = 3427710. Its totient is φ = 860160.

The previous prime is 1720429. The next prime is 1720457. The reversal of 1720448 is 8440271.

It can be written as a sum of positive squares in only one way, i.e., 1658944 + 61504 = 1288^2 + 248^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6593 + ... + 6848.

2^1720448 is an apocalyptic number.

It is an amenable number.

1720448 is a deficient number, since it is larger than the sum of its proper divisors (1707262).

1720448 is an equidigital number, since it uses as much as digits as its factorization.

1720448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13455 (or 13443 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 1720448 is about 1311.6584921389. The cubic root of 1720448 is about 119.8249298966.

The spelling of 1720448 in words is "one million, seven hundred twenty thousand, four hundred forty-eight".