16580428 has 12 divisors (see below), whose sum is σ = 29190672. Its totient is φ = 8240240.

The previous prime is 16580419. The next prime is 16580449. The reversal of 16580428 is 82408561.

It is a junction number, because it is equal to n+sod(n) for n = 16580393 and 16580402.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 11743 + ... + 13078.

It is an arithmetic number, because the mean of its divisors is an integer number (2432556).

Almost surely, 2^16580428 is an apocalyptic number.

It is an amenable number.

16580428 is a deficient number, since it is larger than the sum of its proper divisors (12610244).

16580428 is a wasteful number, since it uses less digits than its factorization.

16580428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24992 (or 24990 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 16580428 is about 4071.9071698652. The cubic root of 16580428 is about 254.9951453645.

Adding to 16580428 its reverse (82408561), we get a palindrome (98988989).

The spelling of 16580428 in words is "sixteen million, five hundred eighty thousand, four hundred twenty-eight".