16432728 has 64 divisors (see below), whose sum is σ = 45696000. Its totient is φ = 4890240.

The previous prime is 16432721. The next prime is 16432733. The reversal of 16432728 is 82723461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16432721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8823 + ... + 10521.

It is an arithmetic number, because the mean of its divisors is an integer number (714000).

Almost surely, 2^16432728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16432728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22848000).

16432728 is an abundant number, since it is smaller than the sum of its proper divisors (29263272).

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

16432728 is a wasteful number, since it uses less digits than its factorization.

16432728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752 (or 1748 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 16432728 is about 4053.7301340864. The cubic root of 16432728 is about 254.2357123295.

It can be divided in two parts, 1643 and 2728, that added together give a triangular number (4371 = T₉₃).

The spelling of 16432728 in words is "sixteen million, four hundred thirty-two thousand, seven hundred twenty-eight".