28934928 has 80 divisors (see below), whose sum is σ = 90619200. Its totient is φ = 8766720.

The previous prime is 28934881. The next prime is 28934933. The reversal of 28934928 is 82943982.

28934928 is a `hidden beast` number, since 289 + 349 + 28 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1708 + ... + 7796.

It is an arithmetic number, because the mean of its divisors is an integer number (1132740).

Almost surely, 2^28934928 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 28934928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45309600).

28934928 is an abundant number, since it is smaller than the sum of its proper divisors (61684272).

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

28934928 is a wasteful number, since it uses less digits than its factorization.

28934928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6117 (or 6105 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 28934928 is about 5379.1196305715. The cubic root of 28934928 is about 307.0017153048.

The spelling of 28934928 in words is "twenty-eight million, nine hundred thirty-four thousand, nine hundred twenty-eight".