16428028 has 6 divisors (see below), whose sum is σ = 28749056. Its totient is φ = 8214012.

The previous prime is 16428023. The next prime is 16428029. The reversal of 16428028 is 82082461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16428023) 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, 2053500 + ... + 2053507.

Almost surely, 2^16428028 is an apocalyptic number.

16428028 is the 2167-th centered heptagonal number.

It is an amenable number.

16428028 is a deficient number, since it is larger than the sum of its proper divisors (12321028).

16428028 is a wasteful number, since it uses less digits than its factorization.

16428028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4107011 (or 4107009 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 16428028 is about 4053.1503796430. The cubic root of 16428028 is about 254.2114716438.

The spelling of 16428028 in words is "sixteen million, four hundred twenty-eight thousand, twenty-eight".