28354728 has 48 divisors (see below), whose sum is σ = 72938880. Its totient is φ = 9185472.

The previous prime is 28354723. The next prime is 28354741. The reversal of 28354728 is 82745382.

It is not an unprimeable number, because it can be changed into a prime (28354723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32425 + ... + 33287.

It is an arithmetic number, because the mean of its divisors is an integer number (1519560).

Almost surely, 2^28354728 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 28354728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36469440).

28354728 is an abundant number, since it is smaller than the sum of its proper divisors (44584152).

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

28354728 is a wasteful number, since it uses less digits than its factorization.

28354728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946 (or 905 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 28354728 is about 5324.9157739818. The cubic root of 28354728 is about 304.9358567970.

The spelling of 28354728 in words is "twenty-eight million, three hundred fifty-four thousand, seven hundred twenty-eight".