28892728 has 16 divisors (see below), whose sum is σ = 54508680. Its totient is φ = 14357088.

The previous prime is 28892723. The next prime is 28892737. The reversal of 28892728 is 82729882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28892723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9775 + ... + 12382.

Almost surely, 2^28892728 is an apocalyptic number.

It is an amenable number.

28892728 is a deficient number, since it is larger than the sum of its proper divisors (25615952).

28892728 is a wasteful number, since it uses less digits than its factorization.

28892728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22326 (or 22322 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 28892728 is about 5375.1956243471. The cubic root of 28892728 is about 306.8523943207.

The spelling of 28892728 in words is "twenty-eight million, eight hundred ninety-two thousand, seven hundred twenty-eight".