1720608 has 24 divisors (see below), whose sum is σ = 4516848. Its totient is φ = 573504.

The previous prime is 1720603. The next prime is 1720613. The reversal of 1720608 is 8060271.

It is an interprime number because it is at equal distance from previous prime (1720603) and next prime (1720613).

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1720603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8866 + ... + 9057.

It is an arithmetic number, because the mean of its divisors is an integer number (188202).

2^1720608 is an apocalyptic number.

It is an amenable number.

1720608 is an abundant number, since it is smaller than the sum of its proper divisors (2796240).

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

1720608 is a wasteful number, since it uses less digits than its factorization.

1720608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17936 (or 17928 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 1720608 is about 1311.7194822065. The cubic root of 1720608 is about 119.8286443156.

Adding to 1720608 its reverse (8060271), we get a palindrome (9780879).

The spelling of 1720608 in words is "one million, seven hundred twenty thousand, six hundred eight".