28326522 has 64 divisors (see below), whose sum is σ = 69431040. Its totient is φ = 7520256.

The previous prime is 28326503. The next prime is 28326553. The reversal of 28326522 is 22562382.

It is a self number, because there is not a number n which added to its sum of digits gives 28326522.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 69054 + ... + 69462.

It is an arithmetic number, because the mean of its divisors is an integer number (1084860).

Almost surely, 2^28326522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28326522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34715520).

28326522 is an abundant number, since it is smaller than the sum of its proper divisors (41104518).

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

28326522 is a wasteful number, since it uses less digits than its factorization.

28326522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535.

The product of its digits is 11520, while the sum is 30.

The square root of 28326522 is about 5322.2666224082. The cubic root of 28326522 is about 304.8347111219.

The spelling of 28326522 in words is "twenty-eight million, three hundred twenty-six thousand, five hundred twenty-two".