1432728 has 96 divisors (see below), whose sum is σ = 4455360. Its totient is φ = 427680.

The previous prime is 1432723. The next prime is 1432729. The reversal of 1432728 is 8272341.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1432723) by changing a digit.

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, 21351 + ... + 21417.

It is an arithmetic number, because the mean of its divisors is an integer number (46410).

2^1432728 is an apocalyptic number.

1432728 is a gapful number since it is divisible by the number (18) 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 1432728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2227680).

1432728 is an abundant number, since it is smaller than the sum of its proper divisors (3022632).

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

1432728 is a wasteful number, since it uses less digits than its factorization.

1432728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 83 counting only the distinct ones).

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

The square root of 1432728 is about 1196.9661649353. The cubic root of 1432728 is about 112.7339133035.

The spelling of 1432728 in words is "one million, four hundred thirty-two thousand, seven hundred twenty-eight".