28908522 has 32 divisors (see below), whose sum is σ = 64915200. Its totient is φ = 9535104.

The previous prime is 28908521. The next prime is 28908541. The reversal of 28908522 is 22580982.

It is not an unprimeable number, because it can be changed into a prime (28908521) 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, 2479 + ... + 7997.

It is an arithmetic number, because the mean of its divisors is an integer number (2028600).

Almost surely, 2^28908522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28908522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32457600).

28908522 is an abundant number, since it is smaller than the sum of its proper divisors (36006678).

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

28908522 is a wasteful number, since it uses less digits than its factorization.

28908522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5627 (or 5621 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28908522 is about 5376.6645794582. The cubic root of 28908522 is about 306.9082970135.

The spelling of 28908522 in words is "twenty-eight million, nine hundred eight thousand, five hundred twenty-two".