1728432 has 40 divisors (see below), whose sum is σ = 4962480. Its totient is φ = 576000.

The previous prime is 1728409. The next prime is 1728439. The reversal of 1728432 is 2348271.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1728396 and 1728405.

It is not an unprimeable number, because it can be changed into a prime (1728439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1569 + ... + 2432.

It is an arithmetic number, because the mean of its divisors is an integer number (124062).

2^1728432 is an apocalyptic number.

1728432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1728432 is an abundant number, since it is smaller than the sum of its proper divisors (3234048).

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

1728432 is a wasteful number, since it uses less digits than its factorization.

1728432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4018 (or 4006 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 1728432 is about 1314.6984445111. The cubic root of 1728432 is about 120.0099991668.

It can be divided in two parts, 1728 and 432, that multiplied together give a square (746496 = 864²).

The spelling of 1728432 in words is "one million, seven hundred twenty-eight thousand, four hundred thirty-two".