16530428 has 6 divisors (see below), whose sum is σ = 28928256. Its totient is φ = 8265212.

The previous prime is 16530427. The next prime is 16530463. The reversal of 16530428 is 82403561.

It is a self number, because there is not a number n which added to its sum of digits gives 16530428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16530427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2066300 + ... + 2066307.

It is an arithmetic number, because the mean of its divisors is an integer number (4821376).

Almost surely, 2^16530428 is an apocalyptic number.

It is an amenable number.

16530428 is a deficient number, since it is larger than the sum of its proper divisors (12397828).

16530428 is a wasteful number, since it uses less digits than its factorization.

16530428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4132611 (or 4132609 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 16530428 is about 4065.7629050401. The cubic root of 16530428 is about 254.7385658428.

Adding to 16530428 its reverse (82403561), we get a palindrome (98933989).

It can be divided in two parts, 16 and 530428, that multiplied together give a palindrome (8486848).

The spelling of 16530428 in words is "sixteen million, five hundred thirty thousand, four hundred twenty-eight".