28658928 has 40 divisors (see below), whose sum is σ = 74245248. Its totient is φ = 9525952.

The previous prime is 28658921. The next prime is 28658933. The reversal of 28658928 is 82985682.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28658921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23551 + ... + 24737.

Almost surely, 2^28658928 is an apocalyptic number.

It is an amenable number.

28658928 is an abundant number, since it is smaller than the sum of its proper divisors (45586320).

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

28658928 is a wasteful number, since it uses less digits than its factorization.

28658928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701 (or 1695 counting only the distinct ones).

The product of its digits is 552960, while the sum is 48.

The square root of 28658928 is about 5353.4034034435. The cubic root of 28658928 is about 306.0224683404.

The spelling of 28658928 in words is "twenty-eight million, six hundred fifty-eight thousand, nine hundred twenty-eight".