1728450 has 72 divisors (see below), whose sum is σ = 4874688. Its totient is φ = 438240.

The previous prime is 1728439. The next prime is 1728451. The reversal of 1728450 is 548271.

It is not an unprimeable number, because it can be changed into a prime (1728451) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 10267 + ... + 10433.

It is an arithmetic number, because the mean of its divisors is an integer number (67704).

2^1728450 is an apocalyptic number.

1728450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1728450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2437344).

1728450 is an abundant number, since it is smaller than the sum of its proper divisors (3146238).

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

1728450 is a wasteful number, since it uses less digits than its factorization.

1728450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1728450 is about 1314.7052901696. The cubic root of 1728450 is about 120.0104157626.

The spelling of 1728450 in words is "one million, seven hundred twenty-eight thousand, four hundred fifty".