28530522 has 32 divisors (see below), whose sum is σ = 67132800. Its totient is φ = 8950464.

The previous prime is 28530521. The next prime is 28530563. The reversal of 28530522 is 22503582.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (28530521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14622 + ... + 16457.

It is an arithmetic number, because the mean of its divisors is an integer number (2097900).

Almost surely, 2^28530522 is an apocalyptic number.

28530522 is an abundant number, since it is smaller than the sum of its proper divisors (38602278).

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

28530522 is a wasteful number, since it uses less digits than its factorization.

28530522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31107 (or 31101 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 28530522 is about 5341.3970082741. The cubic root of 28530522 is about 305.5647406507.

The spelling of 28530522 in words is "twenty-eight million, five hundred thirty thousand, five hundred twenty-two".