16172428 has 12 divisors (see below), whose sum is σ = 28400400. Its totient is φ = 8058032.

The previous prime is 16172417. The next prime is 16172449. The reversal of 16172428 is 82427161.

It is a self number, because there is not a number n which added to its sum of digits gives 16172428.

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 in 3 ways as a sum of consecutive naturals, for example, 5728 + ... + 8071.

It is an arithmetic number, because the mean of its divisors is an integer number (2366700).

Almost surely, 2^16172428 is an apocalyptic number.

It is an amenable number.

16172428 is a deficient number, since it is larger than the sum of its proper divisors (12227972).

16172428 is a wasteful number, since it uses less digits than its factorization.

16172428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14096 (or 14094 counting only the distinct ones).

The product of its digits is 5376, while the sum is 31.

The square root of 16172428 is about 4021.4957416364. The cubic root of 16172428 is about 252.8861679167.

Adding to 16172428 its reverse (82427161), we get a palindrome (98599589).

The spelling of 16172428 in words is "sixteen million, one hundred seventy-two thousand, four hundred twenty-eight".