28530528 has 48 divisors (see below), whose sum is σ = 80657136. Its totient is φ = 8778240.

The previous prime is 28530521. The next prime is 28530563. The reversal of 28530528 is 82503582.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28530521) 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, 10183 + ... + 12678.

It is an arithmetic number, because the mean of its divisors is an integer number (1680357).

Almost surely, 2^28530528 is an apocalyptic number.

It is an amenable number.

28530528 is an abundant number, since it is smaller than the sum of its proper divisors (52126608).

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

28530528 is a wasteful number, since it uses less digits than its factorization.

28530528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22887 (or 22879 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 28530528 is about 5341.3975699249. The cubic root of 28530528 is about 305.5647620709.

The spelling of 28530528 in words is "twenty-eight million, five hundred thirty thousand, five hundred twenty-eight".