28728150 has 96 divisors (see below), whose sum is σ = 81209088. Its totient is φ = 6652800.

The previous prime is 28728121. The next prime is 28728151. The reversal of 28728150 is 5182782.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28728151) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37572 + ... + 38328.

It is an arithmetic number, because the mean of its divisors is an integer number (845928).

Almost surely, 2^28728150 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28728150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40604544).

28728150 is an abundant number, since it is smaller than the sum of its proper divisors (52480938).

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

28728150 is a wasteful number, since it uses less digits than its factorization.

28728150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806 (or 801 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 28728150 is about 5359.8647370992. The cubic root of 28728150 is about 306.2686563673.

The spelling of 28728150 in words is "twenty-eight million, seven hundred twenty-eight thousand, one hundred fifty".