1728372 has 12 divisors (see below), whose sum is σ = 4032896. Its totient is φ = 576120.

The previous prime is 1728361. The next prime is 1728403. The reversal of 1728372 is 2738271.

It is a tau number, because it is divible by the number of its divisors (12).

It is a d-powerful number, because it can be written as 1 + 7 + 2¹³ + 8 + 3¹³ + 7⁶ + 2¹³ .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72004 + ... + 72027.

2^1728372 is an apocalyptic number.

1728372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1728372 is an abundant number, since it is smaller than the sum of its proper divisors (2304524).

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

1728372 is a wasteful number, since it uses less digits than its factorization.

1728372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144038 (or 144036 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The square root of 1728372 is about 1314.6756253921. The cubic root of 1728372 is about 120.0086104933.

The spelling of 1728372 in words is "one million, seven hundred twenty-eight thousand, three hundred seventy-two".