16109028 has 36 divisors (see below), whose sum is σ = 43853628. Its totient is φ = 4956480.

The previous prime is 16109003. The next prime is 16109033. The reversal of 16109028 is 82090161.

It can be written as a sum of positive squares in 2 ways, for example, as 9998244 + 6110784 = 3162^2 + 2472^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 16108992 and 16109010.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16743 + ... + 17678.

Almost surely, 2^16109028 is an apocalyptic number.

16109028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16109028 is an abundant number, since it is smaller than the sum of its proper divisors (27744600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16109028 is a wasteful number, since it uses less digits than its factorization.

16109028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34444 (or 34439 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 16109028 is about 4013.6053617664. The cubic root of 16109028 is about 252.5552759421. Note that the first 3 decimals are identical.

Adding to 16109028 its reverse (82090161), we get a palindrome (98199189).

The spelling of 16109028 in words is "sixteen million, one hundred nine thousand, twenty-eight".