1728732 has 12 divisors (see below), whose sum is σ = 4033736. Its totient is φ = 576240.

The previous prime is 1728697. The next prime is 1728733. The reversal of 1728732 is 2378271.

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

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1728732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1728733) 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, 72019 + ... + 72042.

2^1728732 is an apocalyptic number.

1728732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1728732 is an abundant number, since it is smaller than the sum of its proper divisors (2305004).

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

1728732 is a wasteful number, since it uses less digits than its factorization.

1728732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144068 (or 144066 counting only the distinct ones).

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

The square root of 1728732 is about 1314.8125341660. The cubic root of 1728732 is about 120.0169420524.

The spelling of 1728732 in words is "one million, seven hundred twenty-eight thousand, seven hundred thirty-two".