16430728 has 8 divisors (see below), whose sum is σ = 30807630. Its totient is φ = 8215360.

The previous prime is 16430719. The next prime is 16430731. The reversal of 16430728 is 82703461.

It can be written as a sum of positive squares in only one way, i.e., 12659364 + 3771364 = 3558^2 + 1942^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 16430728.

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 as a sum of consecutive naturals, namely, 1026913 + ... + 1026928.

Almost surely, 2^16430728 is an apocalyptic number.

It is an amenable number.

16430728 is a deficient number, since it is larger than the sum of its proper divisors (14376902).

16430728 is a wasteful number, since it uses less digits than its factorization.

16430728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053847 (or 2053843 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 16430728 is about 4053.4834402030. The cubic root of 16430728 is about 254.2253977091.

The spelling of 16430728 in words is "sixteen million, four hundred thirty thousand, seven hundred twenty-eight".