28016172 has 48 divisors (see below), whose sum is σ = 73164000. Its totient is φ = 9270720.

The previous prime is 28016167. The next prime is 28016173. The reversal of 28016172 is 27161082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28016173) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15222 + ... + 16962.

It is an arithmetic number, because the mean of its divisors is an integer number (1524250).

Almost surely, 2^28016172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28016172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36582000).

28016172 is an abundant number, since it is smaller than the sum of its proper divisors (45147828).

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

28016172 is a wasteful number, since it uses less digits than its factorization.

28016172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1903 (or 1895 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 28016172 is about 5293.0305119090. The cubic root of 28016172 is about 303.7173475036.

The spelling of 28016172 in words is "twenty-eight million, sixteen thousand, one hundred seventy-two".