1720200 has 96 divisors (see below), whose sum is σ = 5535360. Its totient is φ = 441600.

The previous prime is 1720189. The next prime is 1720211. The reversal of 1720200 is 20271.

It is an interprime number because it is at equal distance from previous prime (1720189) and next prime (1720211).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28170 + ... + 28230.

It is an arithmetic number, because the mean of its divisors is an integer number (57660).

2^1720200 is an apocalyptic number.

1720200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1720200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2767680).

1720200 is an abundant number, since it is smaller than the sum of its proper divisors (3815160).

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

1720200 is a wasteful number, since it uses less digits than its factorization.

1720200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 28, while the sum is 12.

The square root of 1720200 is about 1311.5639519291. The cubic root of 1720200 is about 119.8191720919.

Adding to 1720200 its reverse (20271), we get a palindrome (1740471).

The spelling of 1720200 in words is "one million, seven hundred twenty thousand, two hundred".